idle rumble/ missfiring - can't figure out problem
My Audi S3 8l AMK engine has been misfiring on idle, and through out the revs.
I've changed the following...
- New MAF
- New air filter
- 4 brand new ignition coils
- 4 new spark plugs
The engine light doesn't come on, and it rumbling on idle...and it sort of hiccups through out the revs. It also back fires a little as I'm down gearing.
I've noticed the crank case breath hose has a few holes in it, I've order a silicon replacement. Could this be the problem? :/