Hello, I have repaired higher than 30000 vehicles in my career and I need to ask you questions in the past I am not there in person to store up facts, data, or to test your vehicle. I may question you to appear in psychotherapy in my stead. If testing is needed and you would rather not show testing, I can 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 tell you a little more approximately the misery history. It currently has a master tech recognized idle let breathe direct valve and tps installed. without touching anything, the last (used) ecu and my original, would run in the car without this symptom.
in the same way as I begin the car, the engine surges occurring between 1200 and 2000 rpm assist and forth. I untouched the IAC and the TPS past no fine-tune in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to acclimatize the idle quickness screw to belittle the rpm and it would withhold for a while. Now, the engine is until the end of time surging to the point where I cannot drive it for alarm bell of damage to the drive train. Any experienced solution?