The trouble with my buick lesbre is never ending, no hope in sight.
had a mechanic tell me I had a bad ICM because the car does not start hot, it keeps shutting off unless you hold the gas for a minute, after that it is fine well ALMOST.
i replaced the ICM, crank and cam sensors, coils, bosh ultra premium wires and irridium plugs. Also a new fuel pump, filter and pressure regulator on the fuel rail. New upper intake with the upgraded EGR tube and gaskets from the dealer.
as of right now it still does not start after it is hot, it is misfiring on cylinder 1 even after replacing all of the parts I listed, only misfires if I hit passing gear on the highway or up a steep hill, you don't even feel the misfirw but the check engine light goes on the second it is under a load. The fuel pressure is fine, once in a while it sounds like it misses a little at an idle but the light does not go on. Seems to have lots of power, also tested for vacuum leaks and found none. Throttle body has new sensors and is shiny like brand new, no carbon at all. The air charge temp sensor is new too. Sensors are replaced over time not all at once. Car just had a brand new exhaust installed along with 2 new O2 sensors.
the car does not need a CASE relearn, again was told by mechanic.
have the same problem?
Monday, May 28th, 2012 AT 7:31 PM