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General => The garage => Topic started by: Tucker on 19 October 2004, 11:07
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Hi People,
Over the last few days I have noticed a fuel smell in the car, and when she is running she stinks from behind.
A mate of mine siad that she seems a bit slugish too, as this is my 1st MK2 gti I have nothing to comapre it to. he has a valver tho ::)
Help needed
Cheers
Tucker
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Possibly a blocked breather hose?
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Will check them :-[
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Are you using more fuel than normal ?
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Not to sure, I have a heavy foot any way, did seem to last night but did not notice any leaks
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I dont think you have a leak i think you may be over fuelling , or not running properley on all cylinders .
Are the revs higher than normal [i.e. running on choke ]
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I had it tuned on a rolling road and all was ok, then the revs droped and would cut out. i turned up the idle a bit to compensate and it was fine. she seems to hunt a bit tho up and down, only the last few days i can smell petrol in the car and from the zorst ???
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Check the plugs for signs of over fuelling ... I can't remember exactly how they look, but most Haynes manuals have a section at the back to help. If it's that bad then they should look different.
Next .. can u smell the fuel under the bonnet???
If not remember fuel can evaporate dam fast, so u might have a leak else where and just never see a trail !!
Petrol in exhaust fumes just doesn't happen - if there was that amount of unburnt fuel you'd be popping all over the place .. far more likely to be a leak in and around the tank or fuel filler.
Hope this helps u get started ...
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Im not up to much tonight so will give her a good going over
Thank for the advice people
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Right I have been out when it was not raining and had a look.
I had to move it from one garage drive to the other and it smelt like its running rich due to the smell of petrol from the zorst. did not give it time to warm up tho so choke would of been on.
Took the plugs out and smelled quite strong of petrol but would of done if not warmed up. they looked black but not to coked up.
checked the breather's and they seem fine.
Still seems sluggish.
Only had her rolling tuned a month or go ::)
???
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What type of Mk2 GTI do you have - KJet or Digifant??
The fueling on both is controlled differently - but both measure the amount of air entering the engine and adjust the fuel accordingly.
Could be a dodgy MAF - but depends on the model as to what to look for.
When it was on the rollers what Bhp did it put out, and more importanly what did they change/adjust??
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I brought the car then 3 weeks later took her for a tune.
Was running like a bag of poo, idle was high and could not get it down.
He changed over the vacume hoses as they was on the wrong way round, set the timing up, and the mixture and idle. He also said that there should of been a restictor in the brather pipe that come off of the air filter as it was sucking too much air, was pulling great then ::)
he did say it was 100bhp but it only has a rear box on ::)
Not to sure how to tell the differance in KJet or Digifant, its an 1984 1800 gti
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Don't know if this helps but I had similar problem on my MK1 when I bought it. Strong smell of fuel - esp. after filling up the tank. Also, when brimming full the tank, petrol leaked on to the floor from the tank for 10 mins or so.
If I opened the sunroof it smelt REALLY strong so I (wrongly) assumed it was coming from the engine.
Turned out to be the O-ring under the sender unit on top of the petrol tank. I replaced it and problem solved! Obviously, when I brimmed the tank up it leaked out and ran down the tank on to the floor until fuel level was low enough for it to stop!
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If it is a digifant, check the fuel pipes that go onto the injector rail. The hose clips can slacken off and cause a fuel leak when the engine is first started. Try tightening the hose clips.
Steve.
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I have noticed that it happen when its cold, not all the time but now and then, will check pipes cheers steve ;)
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mine was overfueling quite bad and i could smell it in the car. Had it tuned and problem solved. :) what engine are you running? K-jet's tend to run rich down low as they for some reason kick lean on the top end. Maybe whoever tuned it over compensated for this. Hope this helps.
Brad