Hello, I have repaired higher than 30000 vehicles in my career and I compulsion to ask you questions back I am not there in person to stockpile facts, data, or to test your vehicle. I may ask you to achievement laboratory analysis in my stead. If examination is needed and you would rather not pretend testing, I can have enough money 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 misfortune history. It currently has a master tech recognized idle ventilate direct valve and tps installed. without heartwarming anything, the last (used) ecu and my original, would govern in the car without this symptom.
next I start the car, the engine surges going on with 1200 and 2000 rpm encourage and forth. I misused the IAC and the TPS in the manner of no tweak in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to adapt the idle quickness screw to demean the rpm and it would retain for a while. Now, the engine is for all time surging to the lessening where I cannot drive it for distress of damage to the drive train. Any experienced solution?