Hello, I have repaired greater than 30000 vehicles in my career and I need to question you questions past I am not there in person to build up facts, data, or to exam your vehicle. I may ask you to pretend investigation in my stead. If psychotherapy is needed and you would rather not accomplish testing, I can offer 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 more or less the difficulty history. It currently has a master tech endorsed idle freshen manage valve and tps installed. without disturbing anything, the last (used) ecu and my original, would run in the car without this symptom.
following I start the car, the engine surges up amid 1200 and 2000 rpm back up and forth. I misrepresented the IAC and the TPS bearing in mind no regulate in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to adjust the idle keenness screw to belittle the rpm and it would preserve for a while. Now, the engine is until the end of time surging to the narrowing where I cannot steer it for anxiety of damage to the drive train. Any experienced solution?