paintmav

Let me start out by stating I'm a noob so please be kind. I noticed that my S4 was miss-firing while cruising. I replaced all six spark plugs and notice one was bad. Still miss-fire. I replaced the coil pack for the spark plug which was bad and thought the problem was fixed. Well its fine as long as I don't rail on the throttle, or get too high on the tach. I noticed it is worst in 5th and 6th gears. Any ideas? Also no miss-fire code in the comp.

Dr.Duct_Mossburg

dont have any duct tape in their do you ??

paintmav

er...no!

E Vader

...they are the little rectangular modules on the top of your air box with two (balck/tan) plugs going into them.

AudiS4guy - NorCal

what kind of plugs are you using...and are they gapped correctly?

mbox

Those are notorious for going bad and not throwing codes.

paintmav

NGK Titanium and yeah they are gapped correctly. But thanks.

AudiS4guy - NorCal

I had problems with those plugs (Misfires)...so i switched

paintmav

Sorry Guys another noob question. I'm a pilot and EGT for us stands for exhaust gas temp. and thats how we lean our engines. If its the same I don't understand how this would make the engine miss-fire. Thanks again.