Hello, I have repaired greater than 30000 vehicles in my career and I habit to ask you questions back I am not there in person to pile up facts, data, or to exam your vehicle. I may question you to perform examination in my stead. If chemical analysis is needed and you would rather not behave testing, I can meet the expense of 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 burden history. It currently has a master tech ascribed idle expose control valve and tps installed. without heartwarming anything, the last (used) ecu and my original, would manage in the car without this symptom.
subsequently I begin the car, the engine surges taking place between 1200 and 2000 rpm assist and forth. I tainted the IAC and the TPS once no change in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to familiarize the idle promptness screw to subjugate the rpm and it would retain for a while. Now, the engine is all the time surging to the dwindling where I cannot steer it for alarm bell of damage to the drive train. Any experienced solution?