I own a 1996 "old Shape" Audi A6 2.5 TDI (140bhp) with 130,000. I have driven diesels for many years and I know that diesels can be smokey when accelerated hard. I feel that mine does so excessively and I wondered if this is a characteristic of this engine. This email has been prompted by reading an article in last Saturday's "Motoring Telegraph", the chap in the article has run Audis for years and said that he had been pulled over several times by the police for excessive smoke in a couple of his cars.
Honest John has made a comment in the past about fuel timing in these cars needing regular attention, which mine has not had. I have not gone to the bother of having the fuel timing looked at because I believe that poor fuel economy would be present if the timing wasn't correct: the mpg is as good as it has ever been - excellent. The smoke is a dark colour. The car starts first time every morning with some smoke on tickover.
The car passed an MOT smoke test easily in March 2002. Can anyone advise? Am I worrying unecessarily?
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in my opinion i would have a set of reconditioned diesel injectors fitted. your car is 6years old and the nozzles are probobly shot so they are dribbling not spraying correctly.
i would say you are just starting getting worn injector symptoms.
flat spots are next. my dad 1990 golf td kept smoking on idle and under hard accleration. changed injectors like new car again.
will be about £25 exchanged try german and swedish or euro car parts.
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as a cheap way of testing it, try a bottle of injector cleaner first..
madf
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hi,
I own a peugeot 306 dt. The way i fixed this probelm was to "thrash" the car, take it to 100rmp before the redline. eg, if your redline starts at 5000rpm take it to 4900rpm. Do this in 1st - 4th gear.
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Glad to see it is not just me being paranoid...
exactly the same issue as you and I am trying a 2nd hand set of injectors (which have been checked)
The part numbers are different and audi wont tell me if they will fit or confirm what the replacements where from.
I just hate the negative response from audi
are all the dealers the same ?
Keep looing - i'll let you all know if the smoke problem has been cured
jerry
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Don't go to a dealer-go to a diesel injection specialist-they will service your current injectors or check your secondhand set are suitable and service them before they are fitted;if you go to a dealer he will fit a new set or send them to the injection specialist himself.How do you find one?-YELLOW PAGES.
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The car passed an MOT smoke test easily in March 2002. Can anyone advise? Am I worrying unecessarily?
Did it pass one in March 2003 or is this a typo?
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I was wondering about that as well
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>> The car passed an MOT smoke test easily in March 2002. >> Can anyone advise? Am I worrying unecessarily? >> Did it pass one in March 2003 or is this a typo?
Clue: The original post was typed in December 2002 ;-)
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Well spotted Sherlock. Now there's this big dog outside that's giving me trouble. Care to sort that as well?
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Hi there!
I drove an A6 2.5 TDI SE a couple of years ago for about 20,000 miles so I agree with you that these vehicles are a bit smokey but.........I imagine you have gone through the obvious(?) stuff like keeping the air filter clean. My experience would indicate the increase in smoke as the air filter gets blocked / sooted up. I know this may seem a bit noddy (simple) but can be easily missed as a cause with casy rectification.I own a 1996 \"old Shape\" Audi A6 2.5 TDI (140bhp) with 130,000. I have driven diesels for many years and I know that diesels can be smokey when accelerated hard. I feel that mine does so excessively and I wondered if this is a characteristic of this engine. This email has been prompted by reading an article in last Saturday\'s \"Motoring Telegraph\",
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Think you need to state whether greyish or blue tint to smoke.
severe blue smoke would suggest possible valve stem seals gone/oil control rings need replacing. if it was a prob to do with pump.. black smoke is caused by over fuelling. Hj`s comment is more than close to what actually happens
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Steve
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