This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and so not compensated for and can thin the engine out and can as well as permit the engine to rev in the works gone not desired causing severe running. As its a mechanical malfunction it tends not to turn on the malfunction lively and you can sometimes listen a hissing noise subsequent to the engine running.
I did re-check them tho. The master tech did extensive tests on the air flow meter and said it was good. when I unplug it and govern the motor, the car runs uncompromising and at 850ish. I can forlorn guess that my supplementary rebuilt ecu has an issue, or the tps needs to be re-adjusted, or anyhow my maf has died in the midst of all this. I don't think the tps has that much run in the rotate of rpm though? I think it and no-one else adjusts it nearly 1k..
subsequently I begin the car, the engine surges occurring in the company of 1200 and 2000 rpm back up and forth. I tainted the IAC and the TPS next no fine-tune in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to become accustomed the idle readiness screw to subjugate the rpm and it would withhold for a while. Now, the engine is continually surging to the dwindling where I cannot drive it for terrify of broken to the steer train. Any experienced solution?