OK I'm looking for some help here!
Car is an '07 GXP, AT, 2.0 L Turbo.
This is a recurring problem. Keeps setting a P2090 code ("B" camshaft actuator - which has been replaced).
At times, on startup - the engine runs extremely rough and on acceleration from a stop makes a chirpy rattling noise! I can clear the code restart the engine and it runs perfectly fine (!) and will do so for anywhere from a couple hours up to a week. At other times, I can start it up and it runs like crap with this weird chirpy noise and will barely stay running unless you keep your foot on the gas!... but clear the code and the thing runs perfect again! (I've checked the wiring harness and haven't found any broken/frayed wires.) The B camshaft timing actuator has been replaced with a brand new part. I've also put dielectric grease on the contacts of the actuator and the wiring harness connector (which seemed to clear up the problem for about a week), but then the problem came back!
The only thing I haven't done is replace the ECM. I'm wondering if there's some kind of weird intermittent problem with the ECM, a bad ground, bad actuator?
I just don't know where to look next???
Car is an '07 GXP, AT, 2.0 L Turbo.
This is a recurring problem. Keeps setting a P2090 code ("B" camshaft actuator - which has been replaced).
At times, on startup - the engine runs extremely rough and on acceleration from a stop makes a chirpy rattling noise! I can clear the code restart the engine and it runs perfectly fine (!) and will do so for anywhere from a couple hours up to a week. At other times, I can start it up and it runs like crap with this weird chirpy noise and will barely stay running unless you keep your foot on the gas!... but clear the code and the thing runs perfect again! (I've checked the wiring harness and haven't found any broken/frayed wires.) The B camshaft timing actuator has been replaced with a brand new part. I've also put dielectric grease on the contacts of the actuator and the wiring harness connector (which seemed to clear up the problem for about a week), but then the problem came back!
The only thing I haven't done is replace the ECM. I'm wondering if there's some kind of weird intermittent problem with the ECM, a bad ground, bad actuator?
I just don't know where to look next???