Hi there, I am struggling to figure out what is wrong with my car. When she first starts she idles rough (sounds like firing on 3) but after a few mins will sound okish. Very rich though. When she revs she sounds good upto 5.5K then she struglles to go any higher. My theory is over fueling at start hence bad running. Ok mid range cause she is using the fuel. And bad higher revs cause there ain't enough. This is pure guess work and Im blaiming the AFM. I have the Uno Turbo 1.4. Does any one have a spare 'S' module I could loan or does anyone have one to sell. I just need to proof it either works or not. I stay in Fife, Scotland.

Many thanks,

Tony.

Oh everything is virtually new inc, Plugs,leads,dist,and rotor. Plus all oils and belts. And Vac,water and fuel hoses and filters.

Come on guys someone must know something about theses cars?

Please help...

Does it sound like your car is still misfiring or holding back in power even during normal operation?

If so, maybe check your ignition coil. If the coil is faulty, will give bad starting, lowered power range, and increased fuel consumption (due to thumping the throttle to compensate for lowered power ).

When you say you have new filters, does that include the fuel filter?

Any other symptoms? Hope this helps!

Regards
Triatium

Thankyou for someone helping me at last.
Yes it does defo felling as if she is holding back. I have never been in a UT before so have no idea what kick they give. Mine ain't doing it for me so defo think she is lacking something.
I can't get her to start just now. So I have be loaned a Ignition coil and Power module thingy to see if this works. Also going to take of Aux air valve to see if this helps.

Sometimes if I were to rev her hard she would do nothing for a few seconds just as if it was gasping for something.

Please people fire anything at me someone might just have the answear I need. I check daily and will let you know when it is sorted. I only get weekends to play with it as I work away from home.

Thanks :slayer:


Oh and yes all filters, pipes, hoses, plugs, leads, belts, vac hoses everything all brand new.

Hello Tony,

I think you're right about the AFM being a suspect for over-rich running. As I recall, it's a moving-flap type in the Mk2 Turbo as well as the Mk1 Turbo. They are generally very reliable, so if you find another spare to try, chances are that will at least alter the symptoms.

I also wonder about the fuel pressure regulator (the circular capsule device mounted on the fuel rail), as if that's jammed, perhaps that would explain the running-out-of-fuel at higher revs as well as the excessive fuel at idle. Again, you need to find a spare. Do you know of any Uno Turbo Mk2 owners nearby?

Sorry for the lack of response you've received on the forum - the problem is that Mk2 Uno Turbo owners are only a subset of the group, and then owners who have had running problems are a smaller subset again...

Also note my suggestions for Thread Titles ('sticky' at the top of the forum). I've taken the liberty of editing your thread title in the hope it may attract more useful attention.

-Alex

Alex,

Many thanks for your advice. Despretley seaking MK2 spares but coming up with nothing. Didn't quite realise how rare these were when I installed it. If this helps I am also a member of Turbocollective. Which is mainly a UT site and I have managed to upload a picture of my engine bay. This might show a possible fault with my installation.

Cheers,

Tony.

im down in oxfordshire if you need a parets swapping day!

Paul,

Thankyou for the offer Pal but unfortunetly Im up in Scotland. So your a bit to far to lend bits.

However a big thankyou!

Cheers

Tony.

Always a last resort if mine develops any abnormal faults i'll come halfway lol.

good luck by the way (mine runs quite rough on idle, if you put the headlights on, it stalls- it runs that rough)

You could start a 'swapping parts by post' theme...

This is a stab in the dark but you could also try blanking off the recirculating dump valve - i.e. temporarily remove it and plug the holes - as I understand those can interfere with the idling. I would expect that to produce excess air though, rather than 'too rich', so my money's still on the AFM. Have you tried tweaking the mixture adjustment on the AFM - the recessed screw? That's assuming the Mk2 has it...

-Alex

Hi Alex I have tried the screw both ways and no diffrence. Am now on the hunt for an AFM.

I have attached a pic of my engine bay to see if any obvious faults. I don't have original dump valve anymore.

The air flow meter is on it's side,don't know if it'll work as effectivley as the right way up & it looks like you haven't blocked off the old dump valve outlet on the black pipe going to the intercooler which will loose boost & make the car run roughly. Have you cleaned the aux. valve out with brake cleaner as they've been known to clog up in the past. I'd also check/sqeeze every boost pipe & check for splits that may only show up/open under boost(common problem with punto gt's) .

I think that afm has a door/flap that opens when the air is sucked through it.If that afm is on it's side then gravity may be opening the door/flap prematurley giving your fuelling a over reading from the start. It's been 5+ years since i've had a mk2 so i could be wrong. Prefer my mk1's

The AFM should work ok on its side.

Have you pluged up that hole?

How do you know its running rich?

I would start with one thign at a time. If its got a missfire - find the reason. how are the plugs etc, compression?

Right guys cheers for replies. Yes the hole is bunged up. Many X19 conversions have the AFM like this and theres work .. The rich thing is down to smell and the popping from the exhaust. Timing is good though it constantly changes it when you try to time, autuomatic I believe. New plugs and leads etc. Compression also spot on. Aux valve been cleaned out and seems ok. Though not tested on another. But it runs crap even when hot.

Cheers any more feedback most welcome please !! :slayer:

Unplug the aux. valve when it's running,if the engine dies it's working.
Have you driven the car down the road, does it rev normal to a point & then pop & bang and won't pull through?? If so then i'd be looking at a boost leak.

Hi there,

Only had it out once. And it died. Found fault though she had cut through the signal wire to the injection ECU. I don't really want to take her out again until she idles. All fingers point to AFM I think but can't source one of these for the love of money at a fair price.

Can you explain to me how it tried to drive? Have you pluged the hole where the old recirc. valve connects between the turbo & the air flow meter? The same black tubing between the afm & turbo looks twisted in your pic & they have a habit of coming off slightly turbo side which gives erratic running problems. On Uno t's the aux. valve is bolted to the block,does it need to be earthed?

Found this on Ebay http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=250400314302 £60 though

Cheers chap for that.

I had spotted it but like most of us holding out for a better deal. Just a bit gutting when you see them sell for £15-£30.

Looks like Im running out of options though :bang: