Hello, I have repaired greater than 30000 vehicles in my career and I need to ask you questions past I am not there in person to pile up facts, data, or to exam your vehicle. I may ask you to accomplishment breakdown in my stead. If investigation is needed and you would rather not accomplishment testing, I can present 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 about the pain history. It currently has a master tech ascribed idle air manage valve and tps installed. without moving anything, the last (used) ecu and my original, would control in the car without this symptom.
subsequently I begin the car, the engine surges stirring between 1200 and 2000 rpm encourage and forth. I misrepresented the IAC and the TPS later than no tweak in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to familiarize the idle rapidity screw to belittle the rpm and it would hold for a while. Now, the engine is for all time surging to the dwindling where I cannot steer it for scare of damage to the steer train. Any experienced solution?