Hello, I have repaired more than 30000 vehicles in my career and I craving to question you questions back I am not there in person to store up facts, data, or to exam your vehicle. I may question you to take steps breakdown in my stead. If psychotherapy is needed and you would rather not comport yourself testing, I can manage to pay for 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 say you a little more more or less the hardship history. It currently has a master tech attributed idle let breathe govern valve and tps installed. without moving anything, the last (used) ecu and my original, would manage in the car without this symptom.
once I start the car, the engine surges taking place amid 1200 and 2000 rpm back and forth. I changed the IAC and the TPS later no bend in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to accustom yourself the idle rapidity screw to demean the rpm and it would preserve for a while. Now, the engine is at all times surging to the narrowing where I cannot drive it for startle of damage to the drive train. Any experienced solution?