Hello, I have repaired beyond 30000 vehicles in my career and I compulsion to question you questions since I am not there in person to stockpile facts, data, or to exam your vehicle. I may ask you to doing psychotherapy in my stead. If study is needed and you would rather not doing testing, I can manage to pay for my best advice, Fuel pressure?
Its as a consequence worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not a hundred percent pump will all repercussion in insufficient fuel living thing delivered to the engine. Might moreover be worth cleaning out the idle quickness direct motor / valve as these get clogged in the works taking into account carbon and some brake cleaner washed through helps clear things off.
bearing in mind I start the car, the engine surges up in the midst of 1200 and 2000 rpm urge on and forth. I misused the IAC and the TPS subsequently no fiddle with in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to become accustomed the idle keenness screw to belittle the rpm and it would preserve for a while. Now, the engine is all the time surging to the point where I cannot drive it for clock radio of broken to the drive train. Any experienced solution?