Skip the auto shop - Our mechanics make house calls

Q: Misfiring on a 2003 Audi A4 3.0

asked by on

My Audi A4 3.0 'O3 is having a misfire. I already replaced the coil. Sparkplug at one of my coils was drowned in oil of an old leak. Can you tell me what to replace? Is it the MAF sensor or cover gasket?

A: You’ve got to replace the cover gasket valv...

You’ve got to replace the cover gasket valve that’s leaking oil in the spark plugs. But that’s not going to get it to run better right away. But I would change that. If it’s running poorly, it’s not going to make it run well after you changed all the coils because it takes a lot of time to short them out.

You’d want to change it because you know that’s out. But there are a lot of things that can make those things misfire. I’d advise you to see a mechanic to diagnose the misfiring issue for you. I use a Webcom computer which is a very expensive tool that Audis, Porches, and Volkswagens use for figuring out what is wrong with them. I would advise you to have one of those hooked up and check it out rather than just guessing on those parts.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Skipping during idling and driving

Hello. Oil on the spark plugs can be an indication of a failed O-ring, worn piston, or worn valve guide. The first of which is less serious than the others, but it should be inspected sooner than later. Catching a...

Q: Is it possible to change the centre bore to fit new wheels? 2001 Audi A3

Hi there - you want to find hub-centric rings for your specific wheel-hub combination. These steel rings take up the excess space between the wheel hub bore and the hub itself, and allows the correct transfer of vehicle weight to...

Q: vehicle using oil after complete engine overhaul

Engines that have been completely overhauled and rebuilt will burn some oil for the first couple of thousand miles. It is in these first couple of thousand miles that the engine does a lot of breaking in. After an engine...

Related articles

What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.