Technical MultiEcuscan setup

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Technical MultiEcuscan setup

You need an OBD interface and a yellow lead. With the direct connection you can read from the engine module and a few others, but you need the yellow lead to connect to modules such as ABS, airbag, body computer, etc.

If you are going to keep the car, or buy another Fiat or Alfa, a MES kit from Gendan UK is a very worthwhile investment. If you buy from them you are guaranteed to get an interface that works, a yellow lead that works and a proper licensed version of MES.

Then you will be able to interrogate any module on the car as well as perform actuator tests as well.
Can I add that you are also buying into their experise. I decided, after a lot of soul searching, to buy the multiplexed version from them and, although it's a fair bit more expensive, I don't regret spending the money for the convenience of, for instance, being able to quickly do a whole vehicle scan before starting work on it. I've had some quite in depth conversations with them regarding diagnostics and they really know their stuff.

You mention being able to access most modules and do actuator activations - which is very useful - One of the things I find particularly useful is being able to graph sensor outputs. For instance, graph an O2 sensor output and you can see at a glance whether it's doing what it should. Likewise for many others, crankshaft and camshaft outputs, coolant temperature sensors and many others, so much more easily assessed as a graphed line. This is one major reason why I like a PC based scanner. The screen is nice and big so graph resolution is good especially when looking for minor variations in sensor outputs.
 
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All agreed, I simply did not want to overload the OP with too much detail. I wouldn’t be without it, MES is capable of much that the official Witech 2.0 system can do for a fraction of the price.
Absolutely. When you're starting from a low base line it can all seem pretty daunting and you shouldn't kid yourself it's going to be easy. However this kit is very affordable and lets you grow with it as your ability grows. One great thing I quickly discovered is that the components themselves produce very similar outputs no matter what the vehicle. So, once you know what, for instance, an O2 sensor output looks like then it's going to look very similar and suffer the same problems, on another manufacturer's vehicle (oh, ok then, some of the Japanese stuff uses a different "fuel ratio" type, but most don't unless you start looking at very late model vehicles). So what I'm saying is there's a lot of crossover between makes so once you've got your head round it you'll find it probably works for your friends car and your father in laws and, pretty much, uncle Tom Cobley and all! Then you're going to have to buy a more generic scanner because the MES only works really well on Italian cars! Also it's quite difficult to mess things up with MES so you can experiment away with things and are unlikely to do anything dramatic! Also when you click on an action there's a help column appears on the right side of the screen telling you what it does and how to do it. Try the simulate mode, you can learn a lot from it. I'll shut up now before I make a fool of myself by pretending I know more than I do! :unsure::rolleyes:

Edit. You can download the software free here: https://www.multiecuscan.net/ and experiment with the simulation. then go on to buy the interfaces and software licence if you think it's what you want. The free version has limited functionality if you buy the interface leads but you really need to license it for any serious use - not expensive in the great plan of things.
 
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The yellow lead is for airbag, not the red lead. This is incorrectly stated on the Gendan site, by the way...
Thanks Eltezz :)
Huh, that's interesting though. Not only Gendan, I think every reference I've seen lists the red lead as the airbag one.
Happy to be corrected.
All the DTCs my car has thrown up have been read by plugging the interface directly to the OBD port, so I haven't had any need to use any of the adaptors yet.
I only got the full set as it was recommended on here as a reliable interface for MES (after my first cheap bluetooth ELM did nothing but blink at me).
 
Clean the VVT solenoid screens thoroghly, soak in clean oil before replacing then take it out and rev it past 4000 quite a few times. If you dont see an immediae improvement Id be suprised. Under 3600rpm they dont pull strongly. If you want speed you need to demand it! Sedate driving means the VVT stays closeda lot more and they get sticky quite quickly.
Does the twinair have this problem as well?
 
Does the twinair have this problem as well?
No. Twin air has no inlet camshaft. Its all hydro- electronic computer supervised valve actuation. Clever, astonishingly effective and muderously expensive if it goes wrong. But quite a lot of fun. My TA is coming up to 30kmilez so hopefully still a youngster
 
No. Twin air has no inlet camshaft. Its all hydro- electronic computer supervised valve actuation. Clever, astonishingly effective and muderously expensive if it goes wrong. But quite a lot of fun. My TA is coming up to 30kmilez so hopefully still a youngster
Just thought I'd jump in here because I'm very interested in variable valve geometry setups. There have been quite a number of attempts at this over the years and some designs have employed valves actuated by hydraulics and/or electronics completely independent of mechanical linkage to the crankshaft in any way. There's many advantages in being able to control valve opening and closing in this way but it's an expensive way of doing it so, as far as I know, it's never made it's way into a mass produced road going engine?

That notwithstanding, I got very excited when Honda decided to turn their VTEC engine design - which was heavily slanted towards producing power, and very successful at it it was too - towards maximising economy. They called this i-VTEC (Intelligent VTEC). Here's an excellent video which shows how it works:

Especially interesting is how it holds the inlets open long past BDC and keeps the throttle butterfly open fully when in it's economy operating mode, thus virtually eliminating, or at least substantially reducing pumping losses. I took several test drives in a Civic estate with this engine and very nearly bought one some years ago but had to ditch the idea when we found that the diminutive Mrs J couldn't find a comfortable driving position where she could both see the slightly strangely positioned digital speedo and be able to fully depress the clutch pedal. I liked the car a lot and really regret not buying one.

Now though I have the FIAT Multiair system to interest me and I've been looking at it for some time now trying to understand exactly how it works and it's weaknesses, especially as the new Firefly Global Engine uses a version of it. It does have what at first glance looks like a conventional camshaft, but it only operates the exhaust valves directly. On the inlet side the cam lobes operate pumping plungers which compress the engine oil and shoots it down drillings to hydraulic cylinders above the inlet valves. Basically, when the cam depresses the pumping plunger oil is transferred to the cylinder above the relevant valve which then depresses the valve stem and causes the valve to open. What a complicated way to do it? But then you have to understand the "clever" bit. Half way between the pumping plunger and the cylinder above the valve there is an electronically controlled bleed off valve. If this valve is fully open when the pumping plunger is depressed by the cam lobe then the oil bleeds back into the engine without causing that inlet valve to open at all. If the bleed valve is closed all the oil ends up acting on the inlet valve which will be fully opened. Still sounds like a very complicated way to do what camshafts have been doing with valves for many years though? Well, the clever bit is that the electronics can independently open and close the oil system as it likes so bleeding off or not bleeding off oil in this small pressurized system as it likes thus exercising flexibility over when the valve opens and closed in a way no purely mechanical camshaft and follower design can. This allows even more flexibility than the more mechanical system the Honda used so allows even more control over reducing pumping losses, economy and power production - It's very, very clever. Here's a video which demonstrates the main principles:

When you throw in some VVT control then it all becomes super interesting.

Hope you enjoy the videos and can understand my description of how I think the systems work.
The Honda uses a hydraulically operated locking pin to lock the rocker arms together when in "high power" mode and, interestingly I found you could feel that locking in at around the 4,000 rpm mark on the ones I drove. If you kept it below that it was a very docile and driveable engine which I liked because you knew that driving at lower revs fuel consumption was being maximised. If you really needed it though the noticeable extra "punch" was there simply by hanging onto the gears for longer.

The FIAT system, because it has much greater control over valve operation, has considerably greater potential but, whereas the Honda has proved to be reliable and only uses the hydraulics to slide the locking pin on the rocker arms, the FIAT system is hydraulically depressing and releasing the plungers on every revolution of the cam. Think about how often, fast and violently a valve is being operated at even moderate engine revs and this system worries me. The control the system allows is however, indisputable. Using the correct engine oil is not only very important for the survival and long life of the mechanical parts of the system but also seems, from what folk on here who run them have posted, critical to the correct operation of the hydraulics. repairs to the hydraulic block seem to be cripplingly expensive and some parts are only available as a complete unit.

So. Considering whether I'd ever buy and run one? The conclusion I've reached so far is that I might buy a new one where I would be fully in control of ensuring all maintenance was rigorously carried out to schedule and all the correct lubricants and filters etc were used. Don't think I'd risk a used one no matter what it's service book looked like.

I'm looking forward now to reading posts from you folk who do run Multiairs and twinairs and telling me how good they are. As a parting shot. The girl who lives in the flats opposite us has a very trendy 500 Twinair. It's grey with a black roof and black trim including black alloys. She has just had it professionally valeted today and it looks a million dollars - all nice and shiny! However, it sounds absolutely terrible when she starts it up! sounds like everything is knocking and rattling away as if it's about to self destruct at any moment! - I don't know where she gets it serviced but would love to know!
 
Well in terms of drivability and power delivery the TA is truly astonishing. There is no doubting its effectiveness. My TA would knock spots off a decent two litre car from not so many years back. I had a Colt Galant which was a pretty decent thing with balancer shafts making it a smooth if not particularly powerful two litre engine. The TA 874cc unit would walk all over it in terms of power torque and perforance. When you take the economy into account alongside the powere output and its mighty impressive. Taken asa sub 1 litre car 37 - 45 mpg is poor but compared with similar power outputs its good. I have extracted over 60mpg on a long run now I have an understanding of the engine and what goes on so I am now a convert.

On the maitenance front Im with you all the way. Oil in this car must lubricate the engine. Two cylinder with a power output at 100BHP per litre doing this much work must put a LOT of stress on the oil, however good the internal bearings etc are. The stresses are going to be similar to very high powered sports cars. On top of this battering the oil must also both operate and lubricate the Uniair unit operating at high pressure, high temperature and extraordinarily high speed. THe unit involved is effectively non serviceable so feels like the sword of doom hanging over my head.

Would I buy another one? You bet your posterior I would, and in a heartbeat. When people say they are a hoot they are so right. The car will potter about like an old Topolino, or you can belt along at really quite outrageous speed, though the driving characteristics are differrent to anything else I have ever driven, sharing as much in common with diesels as petrol engines in an odd way. Extending to full revs is unproductive as the power drops off at high revs. This may well be by design as its a smooth transition. But changing up just below 5000 rpm and using the urge from the turbo is notably quicker.

I do think about engine and uniair unit life all the time, as well as the DMF and have adjusted drivng significantly. But even with this in the back of my mind the TA can cover ground at very impressive speed, and overtaking lorries, even in groups of two or three is done with great ease, it always suprises me how I can blast past queues gathering on roads like the A17. Ive posted before about its towing prowess too, but I think about engines stress even more when towing so I dont think its going to be used for really heavy stuff and Iewould always take it steady. Thats sensible anyway with a light weight small car. I had a race with my daughter in her 1.2 the other day. It was amusing to drive past with ease when she was gunning it at full stretch trying to prevent me. Im still having a ball on that one!

If the uniair unit parts were freely available, and if Fiat knew diddly squat about how the system works and how to service it, or indeed gave a fig about maintenance at all, it would have been a massive and roaring success. Its a shame it took so long for the multiair to arrive, it might have been something, but for now its going on the list of things that never caught on. If say VAG Audi has taken it up it would have been different. Fiat using the engine at all is pretty staggering as they have not been known for high pace development of the introduction of much new stuff for the best part of 50 years. I don't decry their evolutionary approach, the little 1.2 Panda engine is quite a gem when it running right and proof to me at least that I prefer this way, to quickly developed poor quality engines seen quite often in small cheap cars.

I hope my TA will run on for a lot more miles yet and if it dies I'm almost certainly going to have the car converted to battery power when then time comes as there is nothing on sale, at any price I would rather have. ALL the modern stuff is just too big. Its utterly wasteful on fuel caring round a huge barge of a car when its almost always unladen v's its capacity. I do hanker for an XF or XJ Jag but size and running costs are mad. Why not just burn £20 notes on the fire, its easier and better for the environment. Its easier getting into a Panda 4x4 anyway, so as I get older the Jag idea is less attractive. 6 or 8 cylinders seized up from lack of use would be worse than two! I have now seen the new Panda and while it's good enough of its type, on size alone its not a Panda replacement. Its not a proper Italian Fiat either. Any idea that its a replacement for a Panda wishful thinking. Fiat had a character formed from Italy's mountainous and twist roads and the Pandas were the ultimate example of the character, the TA suits the Panda really well with 4x4 its quite a thing. For Norfolks narrow bumpy and bendy lanes its ideal and the gearing well matched. All we lack is the Alps!! A few styling cues vastly increased in size a, while charming to an extent, does, not a Panda make.

Stellantis have a very very bad track record my family and I wouldn't buy from them again whatever. I suspect (and hope) they wont be around for long. They seem to have lost the plot thinking character is not needed between brands. When they go though it really will be the sad end of Fiat.
 
As we've been talking about the MultiAir engines here I came across this video tonight. Thought it might interest you all.



A spark plug failure like that must be pretty unusual. I can vaguely remember seeing a couple in my whole career where the side electrode had become detached - a warning to all on how careful you have to be if you're going to start mucking about with plug gaps. Most plugs come out the box pre-gapped now a days and long life plugs with their hard metal electrodes are definitely best left alone.
 
According to your link, "Its tyres are manufactured at leading facilities in China and Serbia."

I wouldn't be keen.
Yes, I read that and even recently I'd have agreed. I've had reason to be wary of a couple of the brands of far eastern manufactured tyres I've driven on in the past. One in particular wore at a very low rate indeed until eventually I was forced to scrap them because they were cracking badly although not even half the tread depth had been used up. That particular tyre, in the dry, drove quite well, although, on reflection, I doubt if it's braking performance in an emergency would have been great. It's performance in the wet, especially as it aged, was diabolical. I'm not exaggerating when I say it was like driving on ice! I was young, inexperienced and broke so was happy to live with them for the money it was saving me - never considered I might have an accident. Recently though, there are some very good products being produced by eastern manufacturers, many of which are appearing as original equipment on new vehicles from prestigious manufacturers, So I think we need to think hard about our past impressions of these products. Trouble is, it's difficult to really "know" which are the good ones and which are still cheap rubbish. I like what I read about these Davanti people and I'd be surprised if they are doing anything other than pursuing excellence? https://davanti-tyres.com/

Whilst on this theme, Many of you on here will have read previous posts from me on tyres and will know I worked for a major manufacturer in their racing division many years ago. I'm still very interested indeed in tyres and "stuff" to do with them. Apart from the mechanical side of them, I mean design and manufacture of the tyre structure, the rubbers used - a tyre is not made up of the same rubber all over, the casing and it's cords are encased in a very different type of rubber to the tread rubber which contacts the road. Both must work in harmony to make a "good" tyre. Many people, understandably, will be keen to buy a tyre which wears slowly and lasts a long time. However you need to think about this approach. The problem, putting it very simply - and it's a complicated subject, is that to make it last a long time the rubber in the tread needs to be relatively "hard" but to grip the road surface well it needs to be "soft". Then, when you throw into this mix, (joke here because tyre rubber is actually a synthetic mix of not even 50% natural rubber these days) the fact that rubber oxidises with age and becomes less flexible and more brittle and prone to cracking means that their performance is age dependent. The older a tyre gets the less well it will grip the road. The generally accepted guidance is that a tyre more than 10 years old will be significantly compromised even if it looks fine and performance, although reducing from the moment it goes on the car will be reduced to a measurable degree after around 5 years. With this in mind, and the fact I don't do a high annual mileage, I'm not at all influenced by claims that one make of tyre will outlast another. My priority is to buy a tyre which will grip well and I'm looking to renew at around the 7/8 year mark if it's not worn down to around 2 mm before then. Why 2mm? I was involved in a series of tests on tyres for fast road cars and it became very obvious early on in the tests, which involved a number of manufacturer's products tested back to back - we were interested not just in outright levels of grip but also in how our products compared to competitors products - that performance in conditions where it was not just "wet" but had patchy areas of standing water as you might run into in everyday driving in heavy rain, was significantly compromised when tread depth went below around the 2mm. The legal limit is currently 1.6mm but I'd be nervous about driving at any sort of main road speeds in significantly wet conditions on a tyre worn to this degree. So I'm always interested primarily in any tyre which has good wet weather performance. If it meets that requirement then I'll start comparing it with similar tyres for dry weather performance. Generally a tyre with good wet weather grip is likely to wear a little more quickly than others but, as I'm not going to ever let it get "really old" that doesn't bother me as I'm probably never going to wear it out substantially before it gets too old.

The age old question for most of us though is "how do I know the "good" ones to buy? Especially if, like me, you don't want to unnecessarily buy an overly expensive product? My approach is that I always do a price search for the "big name" products - Michelin, Good Year, Continental, Pirelli, Bridgestone and the like. They are expensive for good reason because they contain the latest and best technology and materials and the strictest quality control etc. I then ring up my wee mobile tyre man to see if he can do me a "deal". I've been using him for years now and he always comes up "trumps" for me. If he can't help then I ask what he'd recommend and, if it's a name I'm not familiar with, I'll do some research before buying. He's never made a recommendation I found unacceptable. The only other thing which I'm very strict with myself about is always having the same make and version of tyre on an axle. So both front and both rear tyres must be a matching pair. Preferably all four tyres would be the same, but I'm not unhappy with different ones on the front to the back as long as they are the same on any axle. Oh, and always newest tyres on the back axle, even if this means a bit of a rearrangement of the other tyres on the car! Why? I know there's an argument for putting them on the front as this might give better braking. Under heavy braking most of the "gripping" effort is thrown to the front tyres due to weight transfer but loading up the tyres and "pressing" them harder into the road surface also increases grip so this concerns me less than the possibility of oversteer if you have old tyres on the rear and new ones on the front. If you always run your newest tyres on the rear the car is much less less likely to whip round on you (oversteer) if you go into a corner too fast. Oversteer requires a very skilled and experienced driver to control. If you ever get the opportunity to drive on a skid pan then do it. It's a sobering and eye opening experience. You'll view driving in a very different light after it. If the rears grip better than the front you are more likely to experience understeer in this sort of circumstance which is where the front, due to loosing grip before the rear, runs wide in the corner and can usually be recovered simply by letting off on the throttle - which you'll do without thinking, and turning the steering wheel more - which will scrub off speed. Only if you're going very much too fast will you then end up in the ditch!

And the "evangelical" parting message to all? I'm sure many reading this will find what I'm going to say now a bit "old hat" but it always bears repeating. Check your tyre pressures regularly, minimum once a month I'd say? On modern vehicles you've got the backup of Pressure Monitoring systems of course, but how failsafe are they? an occasional manual check won't go amiss. But also periodically, even if it's only a couple of times a year. Take a very close look at all your tyres. Of course check tread depth - Tyres will have depth indicator bars to help you check at a glance. Here's a video which shows what you're looking for:



What's the build date? do you even know what that is and where to find it? Here's another video to help you:



Then look at the area around the rim of the wheel. An old tyre will often show cracks here and in the sidewall generally before anywhere else, and remember to look on the inside wall too. Means getting a bit "down and dirty" to do that, especially on rear wheels (you can turn the fronts with the steering). Also look for cracking right down deep in the tread grooves. I recently found early signs on Becky's O/S/R, it's the oldest tyre on the car, so will need a new one for MOT probably. While you're about it, you need to be watching out for any physical damage to the tyre such as cuts and lumps and bumps, especially on the inner sidewall where people seldom bother looking. Your garage should be checking for all this at service time and at MOT, but many people get their service and MOT done at the same time and tyre damage can happen at any time. Obviously check if you've run over something "nasty" or mounted a high kerb etc. Most people don't and even with quite severe damage the car may drive normally, until the tyre bows out!

Oh dear, gone on a bit again, haven't I? Trouble is, having been involved with tyres, especially in my earlier career, I've seen some pretty shocking sights and, in my experience, the majority of everyday drivers seldom give their tyre a second glance or even check pressure - Electronic tyre pressure monitoring is a great idea in my opinion, as long as the driver understands and acts on it. Just of late I've spoken to a number of elderly friends who have bought new cars, perhaps after many years of reliable service from their old one, and they don't have the slightest idea what to do with all the technology in them. My very good friend from just up the road, used to be a welding instructor, has just replaced his Mk1 Jazz with a small Toyota Hybrid and he's stopping almost every time he passes if he sees me outside. He just doesn't have a scooby as to what's going on with the display. The TPI light came on so he, being the practical chap he is, checked all the pressures, found them within a couple of PSI of recommended but then didn't know what to do about turning the light out. He also has trouble with the centre screen reconfiguring it's display unexpectedly. I'm betting he's unintentionally triggering stuff with the steering wheel controls, but who knows? A goodly number of the folk I speak to are much in the same "boat". Used to be folk thought the oil warning light in the older cars came on because the oil needed a top up! This is just "silly" now. On that subject - the oil warning light - I notice the one on my Skoda is now "electronically" controlled. It comes on during the initial bulb check but then, like the other warning lights GOES OUT! It's out from then on, including before the engine is even cranked over. I like to see an oil warning light go out within seconds of fire up. But it seems now that the oil pressure is being monitored by the ECU and the light only illuminates if the ECU detects very low, or no, oil pressure for a period of time. How long will it run with low, or no, oil pressure? Only the manufacturer knows! AAAAARGH!
 
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Yes, I read that and even recently I'd have agreed. I've had reason to be wary of a couple of the brands of far eastern manufactured tyres I've driven on in the past. One in particular wore at a very low rate indeed until eventually I was forced to scrap them because they were cracking badly although not even half the tread depth had been used up. That particular tyre, in the dry, drove quite well, although, on reflection, I doubt if it's braking performance in an emergency would have been great. It's performance in the wet, especially as it aged, was diabolical. I'm not exaggerating when I say it was like driving on ice! I was young, inexperienced and broke so was happy to live with them for the money it was saving me - never considered I might have an accident. Recently though, there are some very good products being produced by eastern manufacturers, many of which are appearing as original equipment on new vehicles from prestigious manufacturers, So I think we need to think hard about our past impressions of these products. Trouble is, it's difficult to really "know" which are the good ones and which are still cheap rubbish. I like what I read about these Davanti people and I'd be surprised if they are doing anything other than pursuing excellence? https://davanti-tyres.com/

Whilst on this theme, Many of you on here will have read previous posts from me on tyres and will know I worked for a major manufacturer in their racing division many years ago. I'm still very interested indeed in tyres and "stuff" to do with them. Apart from the mechanical side of them, I mean design and manufacture of the tyre structure, the rubbers used - a tyre is not made up of the same rubber all over, the casing and it's cords are encased in a very different type of rubber to the tread rubber which contacts the road. Both must work in harmony to make a "good" tyre. Many people, understandably, will be keen to buy a tyre which wears slowly and lasts a long time. However you need to think about this approach. The problem, putting it very simply - and it's a complicated subject, is that to make it last a long time the rubber in the tread needs to be relatively "hard" but to grip the road surface well it needs to be "soft". Then, when you throw into this mix, (joke here because tyre rubber is actually a synthetic mix of not even 50% natural rubber these days) the fact that rubber oxidises with age and becomes less flexible and more brittle and prone to cracking means that their performance is age dependent. The older a tyre gets the less well it will grip the road. The generally accepted guidance is that a tyre more than 10 years old will be significantly compromised even if it looks fine and performance, although reducing from the moment it goes on the car will be reduced to a measurable degree after around 5 years. With this in mind, and the fact I don't do a high annual mileage, I'm not at all influenced by claims that one make of tyre will outlast another. My priority is to buy a tyre which will grip well and I'm looking to renew at around the 7/8 year mark if it's not worn down to around 2 mm before then. Why 2mm? I was involved in a series of tests on tyres for fast road cars and it became very obvious early on in the tests, which involved a number of manufacturer's products tested back to back - we were interested not just in outright levels of grip but also in how our products compared to competitors products - that performance in conditions where it was not just "wet" but had patchy areas of standing water as you might run into in everyday driving in heavy rain, was significantly compromised when tread depth went below around the 2mm. The legal limit is currently 1.6mm but I'd be nervous about driving at any sort of main road speeds in significantly wet conditions on a tyre worn to this degree. So I'm always interested primarily in any tyre which has good wet weather performance. If it meets that requirement then I'll start comparing it with similar tyres for dry weather performance. Generally a tyre with good wet weather grip is likely to wear a little more quickly than others but, as I'm not going to ever let it get "really old" that doesn't bother me as I'm probably never going to wear it out substantially before it gets too old.

The age old question for most of us though is "how do I know the "good" ones to buy? Especially if, like me, you don't want to unnecessarily buy an overly expensive product? My approach is that I always do a price search for the "big name" products - Michelin, Good Year, Continental, Pirelli, Bridgestone and the like. They are expensive for good reason because they contain the latest and best technology and materials and the strictest quality control etc. I then ring up my wee mobile tyre man to see if he can do me a "deal". I've been using him for years now and he always comes up "trumps" for me. If he can't help then I ask what he'd recommend and, if it's a name I'm not familiar with, I'll do some research before buying. He's never made a recommendation I found unacceptable. The only other thing which I'm very strict with myself about is always having the same make and version of tyre on an axle. So both front and both rear tyres must be a matching pair. Preferably all four tyres would be the same, but I'm not unhappy with different ones on the front to the back as long as they are the same on any axle. Oh, and always newest tyres on the back axle, even if this means a bit of a rearrangement of the other tyres on the car! Why? I know there's an argument for putting them on the front as this might give better braking. Under heavy braking most of the "gripping" effort is thrown to the front tyres due to weight transfer but loading up the tyres and "pressing" them harder into the road surface also increases grip so this concerns me less than the possibility of oversteer if you have old tyres on the rear and new ones on the front. If you always run your newest tyres on the rear the car is much less less likely to whip round on you (oversteer) if you go into a corner too fast. Oversteer requires a very skilled and experienced driver to control. If you ever get the opportunity to drive on a skid pan then do it. It's a sobering and eye opening experience. You'll view driving in a very different light after it. If the rears grip better than the front you are more likely to experience understeer in this sort of circumstance which is where the front, due to loosing grip before the rear, runs wide in the corner and can usually be recovered simply by letting off on the throttle - which you'll do without thinking, and turning the steering wheel more - which will scrub off speed. Only if you're going very much too fast will you then end up in the ditch!

And the "evangelical" parting message to all? I'm sure many reading this will find what I'm going to say now a bit "old hat" but it always bears repeating. Check your tyre pressures regularly, minimum once a month I'd say? On modern vehicles you've got the backup of Pressure Monitoring systems of course, but how failsafe are they? an occasional manual check won't go amiss. But also periodically, even if it's only a couple of times a year. Take a very close look at all your tyres. Of course check tread depth - Tyres will have depth indicator bars to help you check at a glance. Here's a video which shows what you're looking for:



What's the build date? do you even know what that is and where to find it? Here's another video to help you:



Then look at the area around the rim of the wheel. An old tyre will often show cracks here and in the sidewall generally before anywhere else, and remember to look on the inside wall too. Means getting a bit "down and dirty" to do that, especially on rear wheels (you can turn the fronts with the steering). Also look for cracking right down deep in the tread grooves. I recently found early signs on Becky's O/S/R, it's the oldest tyre on the car, so will need a new one for MOT probably. While you're about it, you need to be watching out for any physical damage to the tyre such as cuts and lumps and bumps, especially on the inner sidewall where people seldom bother looking. Your garage should be checking for all this at service time and at MOT, but many people get their service and MOT done at the same time and tyre damage can happen at any time. Obviously check if you've run over something "nasty" or mounted a high kerb etc. Most people don't and even with quite severe damage the car may drive normally, until the tyre bows out!

Oh dear, gone on a bit again, haven't I? Trouble is, having been involved with tyres, especially in my earlier career, I've seen some pretty shocking sights and, in my experience, the majority of everyday drivers seldom give their tyre a second glance or even check pressure - Electronic tyre pressure monitoring is a great idea in my opinion, as long as the driver understands and acts on it. Just of late I've spoken to a number of elderly friends who have bought new cars, perhaps after many years of reliable service from their old one, and they don't have the slightest idea what to do with all the technology in them. My very good friend from just up the road, used to be a welding instructor, has just replaced his Mk1 Jazz with a small Toyota Hybrid and he's stopping almost every time he passes if he sees me outside. He just doesn't have a scooby as to what's going on with the display. The TPI light came on so he, being the practical chap he is, checked all the pressures, found them within a couple of PSI of recommended but then didn't know what to do about turning the light out. He also has trouble with the centre screen reconfiguring it's display unexpectedly. I'm betting he's unintentionally triggering stuff with the steering wheel controls, but who knows? A goodly number of the folk I speak to are much in the same "boat". Used to be folk thought the oil warning light in the older cars came on because the oil needed a top up! This is just "silly" now. On that subject - the oil warning light - I notice the one on my Skoda is now "electronically" controlled. It comes on during the initial bulb check but then, like the other warning lights GOES OUT! It's out from then on, including before the engine is even cranked over. I like to see an oil warning light go out within seconds of fire up. But it seems now that the oil pressure is being monitored by the ECU and the light only illuminates if the ECU detects very low, or no, oil pressure for a period of time. How long will it run with low, or no, oil pressure? Only the manufacturer knows! AAAAARGH!

Great post. I totally agree re oil.pressure lights. ECU computers, DONT TRUST EM. Products of satan. No infallible and prone to feelings of self importance when least required. Ok they do have some good points, but the day I trusy a computer more than my own judgement on life changing decisions hasnt come yet.
Ichuck tyres at 3.5mm as ve seen tests that show at that point drop off on performance becomes massive.

Since two frightening experiences on Michelin zx and xzx tyres I will only fit the tyres with the top ratings from current tests. I know its overkill and agree with you tyre selection is only about grip. Moving from cheap tyres to the best available is eye opening in terms of corneting and stopping power.
My inter stellar company milage of around 100 k miles a year for nearly 20 years gave me a chance to test tyres to the limit. I tried them all I think.
Asian made Goodyears were as bad as anything ever drove. European ones have all been very good. My dabble with Michelin in the mid 70s meant it was 45 years before I had another Mich. That was forced on me by ATS who were the company supplier. Lucky for Michelin as I have chosen them most of the time since. My daughter with Pands bird 4 has two Falkens on the front though and they are exactly as you say decent. Otherwise they would have been binned, much like my xzx sin 75. I had then removed after around 10 miles. The tyreman thought it was christmas. Our Ruby Panda runs Good year ,Panda bird 3 is on Good year vector all season, Pb4 is on Falken front and Goodyear backs, Noop runs Continental Contact 6 summer Michelin Alpin in Winter. Contis are excellent as are the Mich (if noisy).
 
Great post. I totally agree re oil.pressure lights. ECU computers, DONT TRUST EM. Products of satan. No infallible and prone to feelings of self importance when least required. Ok they do have some good points, but the day I trusy a computer more than my own judgement on life changing decisions hasnt come yet.
Ichuck tyres at 3.5mm as ve seen tests that show at that point drop off on performance becomes massive.

Since two frightening experiences on Michelin zx and xzx tyres I will only fit the tyres with the top ratings from current tests. I know its overkill and agree with you tyre selection is only about grip. Moving from cheap tyres to the best available is eye opening in terms of corneting and stopping power.
My inter stellar company milage of around 100 k miles a year for nearly 20 years gave me a chance to test tyres to the limit. I tried them all I think.
Asian made Goodyears were as bad as anything ever drove. European ones have all been very good. My dabble with Michelin in the mid 70s meant it was 45 years before I had another Mich. That was forced on me by ATS who were the company supplier. Lucky for Michelin as I have chosen them most of the time since. My daughter with Pands bird 4 has two Falkens on the front though and they are exactly as you say decent. Otherwise they would have been binned, much like my xzx sin 75. I had then removed after around 10 miles. The tyreman thought it was christmas. Our Ruby Panda runs Good year ,Panda bird 3 is on Good year vector all season, Pb4 is on Falken front and Goodyear backs, Noop runs Continental Contact 6 summer Michelin Alpin in Winter. Contis are excellent as are the Mich (if noisy).
Aye, the old Michelins had a fantastic reputation for lasting but I think they sacrificed grip for it. I remember the original X was well known for it. Now a days though they are a good tyre. Back in my day, the Michelins were generally regarded as having the very best casing designs though. Agree about the Falkens - which kind of goes to prove what I was saying about the latest products from the far east. I had them on the Ibiza and thought them a bit noisy but otherwise very good. On reflection though I think it more likely it was the gearbox in the very earliest stages of failing - Which it did most spectacularly on the M5 as I posted back when it happened. Ouch, that was an expensive experience.
 
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