Are the ignition control modules located on the air box? Are these available from most car part stores?

 

Read & follow post #7......

 

CTS: Coolant Temperature Sensor?

 

Replased CTS, no change. Any other ideas???

 

I am not particularily sure whether this is the case for 2.7T, but when I used to work on my old V8s, intake runnerfor a cylinder isusually coupled with another cylinder on the opposite site. So if you develop a leak on one side, it also fouls up theother side as well. Since you are misfiring on 2 and 5, I suggest you dig a bit more into vacuum leak possibility. It could be the intake gasket to the head, and it is letting air into both no.2 and no.5 cylinders.

As for the oil, if the car misfires, it tends to build up black tar like substance. It is basically semi-combusted gas residue. Are you sure that what you are seeing is oil build up, not just uncombusted gas residue? If it is oil, you might have a bigger problem on hand.

 

I sure am gonna miss you when/if you leave

 

[/align][align=right]Yes they are on the airbox. Usually you can get them at parts stores but theyll be like 100 bucks each. I wanna say swap them from side to side but im not sure if that will help with diagnois at all. What was the compression on the other cylinders? The balance is what really matters. If you want you can leave the coil connected with the spark plug out. Make sure its laying on the valvecover so its grounded. If you have spark, that pretty much rules out the ignition control module. Just for the hell of it I would try swapping injectors, but itd be odd for two to go out at the same time.[/align]

 

tried that with the injectors already. Actually replased one of them. no change. I did not check compression to the other cylinders. That may be my next objective.

 

just had the same thing happen to me ... 550$ at the dealer to replace ignition control module ?? the codes came up missfire and i replaced all the plugs and coilpacks no change so i gave up bc of lack of time and the dealer replaced the ICM and now she runs fine

 

i am having the exact same problem with my 2000 A6 2.7T. Just had my spark plugs replaced along with some valve cover gaskets to fix the oil leak. Still running rough and shakes when idle. Also it doesn't accelerate like it used to and if I get it up to 60 it really shakes. Going back to the shop to see what can be done next.