Intermittent stall at idle, on decel, and intermittent lack of power requiring more throttle to maintain same speed on freeway. 3x on freeway it stumbled, but pumped throttle and was okay. After pump had to give full throttle to get to go and it bucked. Once took off I back of throttle, but then it didn't shift normally. After a few seconds it was fine but seemed to lack power. After approx 3 minutes it was like a switch flipped and ran perfect with very little throttle required at cruise. Sometimes at idle it starts to shake and stall; if I quickly put in neutral and rev it hard a few times it will keep running. Never thrown a CEL or code. If idling and stalls, won't start unless I give throttle. Once starts it stalls again unless I rev it hard a few times. Has stalled while slowing on an off ramp and it started, but wouldn’t stay running and had to do neutral drop to get it going. I took to Infinity dealer and they said "we don't know what's wrong, sorry. With no CEL we can't fix." "Bring it back when it quits or throws a code." MAF was cleaned, fuel filter replaced, coolant temp sensor, knock sensor, and O2 sensors replaced. Dealer said IAC okay, and EGR and solenoid ok. I'm a decent mechanic, but this one has me and the dealer stumped.
have the same problem?
Sunday, February 6th, 2011 AT 11:11 PM