I have a 3.0 V6 and have been trying to chase down why it would not idle smoothly, it intermittently (every ~10 seconds) fluctuates by about +/- 300rpm. I have changed: Idle control Valve, Throttle potentiometer, Coil pack, HT leads, Spark plugs, Lambda sensor, MAF sensor, Inlet manifold gaskets. I also have my own Code reader that I can view the log files with and nothing is coming up at all over 3 months (must be a record in its self). Does anyone know what might cause a this intermittent bad idling and stalling when steering, parking and edging in traffic? Sometimes misfires for the first 5 seconds in the morning as well and does appear to be worst when the car is facing down hill. Performs just fine through the rev range. Temperature makes no difference but it does like damp mornings. Regards Gary