Hello, I have repaired on top of 30000 vehicles in my career and I dependence to question you questions before I am not there in person to gather facts, data, or to exam your vehicle. I may question you to sham testing in my stead. If chemical analysis is needed and you would rather not act out testing, I can provide my best advice, Fuel pressure?
Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me tell you a tiny more approximately the pain history. It currently has a master tech recognized idle let breathe rule valve and tps installed. without disturbing anything, the last (used) ecu and my original, would govern in the car without this symptom.
as soon as I start the car, the engine surges occurring amid 1200 and 2000 rpm support and forth. I misused the IAC and the TPS when no amend in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to adapt the idle rapidity screw to lower the rpm and it would hold for a while. Now, the engine is permanently surging to the dwindling where I cannot steer it for buzzer of damage to the steer train. Any experienced solution?