Hi recently bought an a4 2.0 petrol which has started to miss fire bringing on the engine light any clues to what i need i use to have a lot of old cars where i would change the plugs and leads but the leads look a lot diffrent can i still do this ???????? also it seems to use a lot of oil ?????
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Re: a4 2.0 miss fire
The four-cylinder Audis are known to have issues sometimes with the coil packs. Can you have your car's ECU scanned for fault codes? You may have a stored code even if the check engine light isn't on. If you have no codes, I'd look at changing the plugs at the very least, and make sure they're gapped to factory spec. Then get some Seafoam at the parts store and do the vacuum system with it - see if that helps, and if not, post back up and we'll take it from there.
That same thing happened in my 01 a6 and it was very pricy! if i was you i would stop driving it immediately! i made that mistake and cost me $6432! i had to replace things in my engine and it fried bothe o2 sensors and both cats but especially if the light starts flashing thats bad news for you but i would reccomend taking it to a shop. your call
I just purchased a 98 Audi A4 1.8T. I was checking the spark plugs and noticed that the wires and the spark plugs had some oil on them. Im assuming this is the gasket as you said. Could you post that link for me. Also i checked the oil and it seems whoever did it overfilled the oil (Could this be the cause as well?) In any case i am going to drain some oil, as too much is bad.
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Is there any service engine lights on ? is it always or just, hot /or cold what is the miles on it , and have you had any maintenance done. in last year or two? / it could be some thin very simple, like plugged air filter/bad temp sensor/or fuel filter / or just Warren out spark plugs / but all this is just a guess unless we can git a little more info. if no service engine light, then i would start with basic tune up maintenance/ least expensive first/ last of all it does sound as tho it could be a clogged catalytic converter,[ But a clogged fuel filter will too.] so i am not advocating any thin expensive/ only to start with basic maintenance first that may salve your concern/please let us know if this is helpful and please if we can be of any further assistance feel free to ask. Thank You.
Do you get black exhaust smoke when first started? If so, then there is too much fuel at first which probably fouls several spark plugs, but as the engine warms up, the plugs start firing again. If no black smoke--is the check engine light ON? Read the code(s) if so and follow the clues.
Could be simple thing like a plug, had a sservice recently???
However these engines are very very common for head gasket failure, check fluids, i.e, coolant look for oil contamination, and oil check for water etc, check plugs for wear and corrosion.