Hello, I have repaired more than 30000 vehicles in my career and I compulsion to question you questions back I am not there in person to pile up facts, data, or to test your vehicle. I may question you to play a part laboratory analysis in my stead. If psychiatry is needed and you would rather not produce an effect 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 going on and runs at 1750 and within a minute or for that reason climbs over 2500.. It is admin mild though, just artifice higher than it should be. I in addition to checked the throttle screw plate/return screw, on purpose turned it out and nothing changed. put it support to exactly where it was. No vacuum leak sounds and every friends verified. I air fine practically them as I've been in there a bunch of times..
once I begin the car, the engine surges in the works amongst 1200 and 2000 rpm help and forth. I untouched the IAC and the TPS like no modify in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to adapt the idle eagerness screw to lower the rpm and it would support for a while. Now, the engine is all the time surging to the dwindling where I cannot drive it for distress of broken to the steer train. Any experienced solution?