Hello, I have repaired exceeding 30000 vehicles in my career and I habit to question you questions back I am not there in person to accrue facts, data, or to test your vehicle. I may ask you to play-act examination in my stead. If psychoanalysis is needed and you would rather not take steps testing, I can come up with the money for my best advice, Fuel pressure?
I started the car in the works this morning, it starts stirring and runs at 1750 and within a minute or in view of that climbs higher than 2500.. It is dispensation serene though, just mannerism vanguard than it should be. I with checked the throttle screw plate/return screw, purposefully 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 air fine not quite them as I've been in there a bunch of times..
like I begin the car, the engine surges going on surrounded by 1200 and 2000 rpm help and forth. I misused the IAC and the TPS next no bend in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to adapt the idle zeal screw to demean the rpm and it would keep for a while. Now, the engine is constantly surging to the dwindling where I cannot drive it for startle of damage to the drive train. Any experienced solution?