Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Went & looked at a 1999 ES300 with the 3.0 L V6 in it. It had some misfire codes & I was looking at the fuel trims. It had no long term or short term readings. They were stuck at 0. Yes, the car was in closed loop. I was getting O2 readings that changed as I raised & lowered the rpm. Anyone ever experience this? thanks
