Hello, I have repaired beyond 30000 vehicles in my career and I obsession to ask you questions since I am not there in person to assemble facts, data, or to exam your vehicle. I may question you to take steps scrutiny in my stead. If examination is needed and you would rather not be in 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 say you a tiny more just about the problem history. It currently has a master tech recognized idle air direct valve and tps installed. without distressing anything, the last (used) ecu and my original, would direct in the car without this symptom.
subsequently I start the car, the engine surges happening between 1200 and 2000 rpm back up and forth. I misused the IAC and the TPS once no tweak 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 zeal screw to demean the rpm and it would preserve for a while. Now, the engine is until the end of time surging to the lessening where I cannot steer it for scare of broken to the drive train. Any experienced solution?
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