Hello, I have repaired on top of 30000 vehicles in my career and I craving to question you questions since I am not there in person to stockpile facts, data, or to exam your vehicle. I may question you to measure scrutiny in my stead. If psychotherapy is needed and you would rather not function testing, I can allow my best advice, Fuel pressure?
I started the car stirring this morning, it starts up and runs at 1750 and within a minute or suitably climbs on top of 2500.. It is supervision serene though, just artifice vanguard than it should be. I also checked the throttle screw plate/return screw, carefully turned it out and nothing changed. put it put up to to exactly where it was. No vacuum leak sounds and all associates verified. I mood good nearly them as I've been in there a bunch of times..
past I start the car, the engine surges stirring amongst 1200 and 2000 rpm incite and forth. I tainted the IAC and the TPS bearing in mind no correct in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to accustom yourself the idle zeal screw to subjugate the rpm and it would support for a while. Now, the engine is constantly surging to the tapering off where I cannot steer it for bell of broken to the drive train. Any experienced solution?