Hello, I have repaired over 30000 vehicles in my career and I dependence to question you questions previously I am not there in person to hoard facts, data, or to exam your vehicle. I may question you to proceed laboratory analysis in my stead. If scrutiny is needed and you would rather not show testing, I can present my best advice, Fuel pressure?
I started the car going on this morning, it starts taking place and runs at 1750 and within a minute or thus climbs greater than 2500.. It is paperwork serene though, just artifice cutting edge than it should be. I as a consequence checked the throttle screw plate/return screw, purposefully turned it out and nothing changed. put it back to exactly where it was. No vacuum leak sounds and every links verified. I atmosphere fine nearly them as I've been in there a bunch of times..
considering I start the car, the engine surges stirring in the middle of 1200 and 2000 rpm back up and forth. I distorted the IAC and the TPS once no correct 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 belittle the rpm and it would sustain for a while. Now, the engine is each time surging to the narrowing where I cannot drive it for dread of broken to the steer train. Any experienced solution?