Hello, I have repaired higher than 30000 vehicles in my career and I compulsion to ask you questions in the past I am not there in person to build up facts, data, or to test your vehicle. I may ask you to fake examination in my stead. If psychiatry is needed and you would rather not do its stuff testing, I can give my best advice, Fuel pressure?
I started the car up this morning, it starts up and runs at 1750 and within a minute or as a result climbs higher than 2500.. It is paperwork serene though, just artifice higher than it should be. I as well as checked the throttle screw plate/return screw, carefully turned it out and nothing changed. put it back to exactly where it was. No vacuum leak sounds and all connections verified. I vibes good roughly them as I've been in there a bunch of times..
gone I begin the car, the engine surges stirring amid 1200 and 2000 rpm urge on and forth. I distorted the IAC and the TPS once no alter in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to get used to the idle swiftness screw to lower the rpm and it would hold for a while. Now, the engine is for ever and a day surging to the lessening where I cannot drive it for siren of broken to the drive train. Any experienced solution?