Hello, I have repaired exceeding 30000 vehicles in my career and I dependence to ask you questions back I am not there in person to build up facts, data, or to exam your vehicle. I may ask you to produce an effect assay in my stead. If study is needed and you would rather not put-on testing, I can have enough money my best advice, Fuel pressure?
I started the car in the works this morning, it starts happening and runs at 1750 and within a minute or appropriately climbs exceeding 2500.. It is paperwork mild though, just quirk far ahead than it should be. I then checked the throttle screw plate/return screw, purposefully turned it out and nothing changed. put it incite to exactly where it was. No vacuum leak sounds and all associates verified. I air fine approximately them as I've been in there a bunch of times..
as soon as I start the car, the engine surges occurring amongst 1200 and 2000 rpm put up to and forth. I tainted the IAC and the TPS later no bend in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to adjust the idle quickness screw to subjugate the rpm and it would support for a while. Now, the engine is permanently surging to the dwindling where I cannot steer it for frighten of damage to the drive train. Any experienced solution?