Technical Water in the diesel

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Technical Water in the diesel

Two stroke oil is sometimes used to lubricate the fuelpump, it has no cleaning affects on the injectors at all.
I use this at every third fill-up or so, to boost the lubrification and cleaning affects of the premium dieselfuel I use.
Still on the original, first fuelpump, injectors and turbo after about 250000 mls...on my 2004 jtd, 150HP Alfa GT.

https://products.liqui-moly.com/speed-diesel-additive-3.html

I feeeel the need... :D

I'll get me some... you can't be too clean in the injectors. :) In my petrol 145 I used kerosene.. since that is mostly (90%) what injector cleaner is. I dunno (probably okay?) if kerosene would work for diesels too.

On my 145 the injectors went off to be cleaned while I was fixing the top end (water pump broke) ... and the before/after showed the worst one as 92% of max flow, vs 95% after cleaning. The other injectors were 94-95% and went up to 96-97%. So the kerosene was not doing a bad job (car on 150,000 miles).


Ralf S.
 
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It's the middle connector at the top of the dashboard fuse box. For left hand drive Stilos, it's at the bottom of the fuse box.
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MAFs would not give a fault code. They never do. The nature of the way they fail means that unless it fails to the point that the car things it's unplugged it'll not tell you anything. Lambdas dont often produce fault codes either.

It's a tough one to call but i'm going to wonder whether it's a fuel pressure sensor or similar.

I will be interested to see what it comes back with.
 
Splendid help gents, thanks.

I'm familiar with that fuse box..! :D

I had an instrument console failure that I could clear for a while (until it got worse and needed a proper repair) by taking out/replacing the F53/F32 fuses.

I also swapped the BCM behind the fusebox for a replacement one to fix a headlights high beam problem (fault within the BCM... the repair was "swap my EPROMs to the replacement BCM")..

The EML light was on before the new BCM went in .. so the new BCM isn't causing it.

Thinking about it.. Gerrard passed the MOT smoke/emissions with the EML on.. which is pretty good going.. He wants to live! :D

Hopefully I'll receive my new 096 battery and the probe before the weekend... :) I'll give my spare (unknown quantity) MAF a try to see if it affects anything... and then see what codes lurk in the depths... :eek:


Ralf S.
 
Is your odometer not flashing since you replaced the BCM? I'd have thought the can network would want a proxy alignment doing to integrate it to the network.

Yes.. he's flashing away still, since I fitted the new console.

The dead console was a separate problem to the BCM problem (which I needed to replace to fix the high beam circuit problem) and *that* was a separate problem to the EML coming on. :D

EML lately popped up while I was fiddling with the fuse/relay box under the bonnet (tracking down the high-beams problem) but I've cleaned and re-checked that to death since then and everything seems to be securely connected okay, so I think it was a coincidence. EML always comes on when I start the engine, not before.

If I get the reader on the beast and can make it work :D then that might point me in the right direction.

The manifold sensor and the little vacuum pump under the battery are new (last autumn) and the EGR is cleaned up and blanked off. EGR did give me an EML fault soon after I got the car... but cleaning it and blanking it off solved it that time. the light went out by itself.

Back then the car had a definite flat spot at 3250 rpm and fuel consumption was not that bad (a few mpg off). This time it's quite a plateau of flat performance (a flateau? :D ) above 3000rpm and the fuel consumption is at "burning Kuwaiti Oil Field" level. I also remember (?) that the EML came on during it's checks, even if the engine was not started.. (I may be wrong) but anyway, I don't think it's The EGR.

Lambda was allegedly new c.2015 (previous owner) and glo-plugs were new last year. MAF looks quite manky down there by the radiator... and there's apparently a vaccum pump on the gas recirculation box.... otherwise it's not bad.

My money is on the MAF being FUBAR but I'll see if the other one I have does anything different and read the codes before deciding what to dismantle next.. :D


Ralf S.
 
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If you live somewhere fairly quiet, unplug the MAF and go for a drive then - see what it does. Thats how we used to diagnose them on the Alfas.

Unplug it - if it got worse not better it's probably not MAF related. If it got better with it unplugged then MAF is potentially an issue.

Be prepared for it possibly stalling although it may well idle OK on choke initially.

I went for a rolling road day down in Enfield (3hrs ish drive) in my Alfa twin spark back in the day. The exhaust probe noted that it was running pretty lean and it only made about 125bhp (1.8 twin spark). We looked at each other - said "unplug that MAF and run it again". Did that and it came back with 152 bhp and fueling trims were more like where you'd expect them.

Drove it all the way home with the MAF unplugged, albeit stopping at roundabouts on the A1 was a nightmare as it sometimes stalled without the MAF.
 
If you live somewhere fairly quiet, unplug the MAF and go for a drive then - see what it does. Thats how we used to diagnose them on the Alfas.

Unplug it - if it got worse not better it's probably not MAF related. If it got better with it unplugged then MAF is potentially an issue.

Be prepared for it possibly stalling although it may well idle OK on choke initially.

I went for a rolling road day down in Enfield (3hrs ish drive) in my Alfa twin spark back in the day. The exhaust probe noted that it was running pretty lean and it only made about 125bhp (1.8 twin spark). We looked at each other - said "unplug that MAF and run it again". Did that and it came back with 152 bhp and fueling trims were more like where you'd expect them.

Drove it all the way home with the MAF unplugged, albeit stopping at roundabouts on the A1 was a nightmare as it sometimes stalled without the MAF.


When I unplugged the MAF with the engine running, it didn't even notice. Plugging in another spare/old MAF (unknown condition) with the engine running also didn't make the car do anything different.. it just continued idling away as if nothing had happened to it.

I started the car a few times with the other MAF connected but the "Engine Fault" message kept appearing.


I'm wondering if the problem with the wiring/circuit to the MAF...? :confused: Is there a way to test the circuit?

The error did first appear around the time I was poking around with the engine-bay relays/fusebox.. although I've cleaned and reassembled all the fuses, relays and connectors and it looks pretty good in there now.

I stuffed an 096 battery in there too over the weekend.. I have plenty of juice.. :D


Ralf S.
 
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Iam betting the last owner used a none OEM lambda. Now it's failed. This would cause your huge fuel problem. The Maf on some cars when unplugged can make no difference, as the PCM takes over.
Only use a Bosch Lambda.
 
Update: I have some FiatECU scan software (cheers lad! :D ) and a new OBD cable with a lot of LED's on it.. :eek: so the beast is going to get its brains scanned this weekend.

Hopefully I'll then have an idea why it thinks there's an "Engine Fault". It's still running not bad... but not quite as "lively" in the pickup and at higher revs as it used to be.

On the other hand, sticking in a new Bosch MAF has not fixed either of these issues.. but the fuel consumption has still improved - back into the 50's mpg rather than mid-high 30's... so that bit at least is better than it was before.

I've cleaned the injectors to buggeration with a shot of pukka diesel injector cleaner (Wynn's) which smelt like kerosene.. so also a shot of kerosene mixed with some 2-EHN. I'm pretty sure there's not much drama at the fuel system/injector end.


Ralf S.
 
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