Engine problems 3.4L Camaro
My camaro makes me crazy. For months I and my dealer try to find the problem.
The problem is the following:
When I start the engine it seems to run very rough (hot or cold makes no difference). A light smell of fuel comes from the exhaust. The spark plugs are black! When I try to drive around it feels like the engine has no power at all. It shakes and backfires all the way. Sometimes the car would not start but when you wait for 10 or 15 minutes it starts! Then mostly runs perfect. But now it always runs that "too rich" way.
My mechanic is convinced that it must be an ignition problem but these parts have been replaced:
- EGR (was leaking)
- Camshaft sensor
- MAP sensor
- Catalytic converter
Fuel pressure seems ok (40PSI) and there seems not to be a vacuum leak (tested with startpilot).
I read the codes, no ones were stored. The BLM and INT values told me that the engine runs WAY to rich! The values were around 100 / 110 !!!
Does anyone have another idea what could cause this problem??
Last edited by sateng; May 1st, 11 at 12:54 PM.