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?

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
  1. Home
  2. Questions
  3. Misfiring on a 2003 Audi A4 3.0

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: Two mechanics have not been able to repair misfire.

Hi there. Check the intake for a possible vacuum leak around the cylinder 4. If there is no vacuum leak around the cylinder number 4, then there could be a burned valve. Check the compression on all of the cylinders...

Q: Wondering if repairs are likely in the near future

Hi there. Most cars are reliable under 100,000 miles. Among the range of cars on the market, Audi is about mid pack in regards to reliability at best. Most Audi's are VW's. In the case of your TT, the 2.0l...

Q: My car will crank and doesn't start - delayed in the AC

Your Audi is known for having timing chain issues. This is the first thing I would suspect. The timing chain tensioners fail and the chain will jump teeth and damage valves. At the very least you will need the timing...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.