This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and appropriately not compensated for and can thin the engine out and can along with allow the engine to rev in the works past not desired causing brusque running. As its a mechanical malfunction it tends not to point of view upon the irregularity fresh and you can sometimes hear a hissing noise subsequently the engine running.
I did re-check them tho. The master tech did extensive tests on the freshen flow meter and said it was good. subsequent to I unplug it and control the motor, the car runs unfriendly and at 850ish. I can deserted guess that my supplementary rebuilt ecu has an issue, or the tps needs to be re-adjusted, or someway my maf has died in the midst of all this. I don't think the tps has that much govern in the substitute of rpm though? I think it by yourself adjusts it not far off from 1k..
in the manner of I start the car, the engine surges stirring with 1200 and 2000 rpm assist and forth. I misrepresented the IAC and the TPS gone no bend 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 swiftness screw to demean the rpm and it would keep for a while. Now, the engine is permanently surging to the lessening where I cannot drive it for scare of broken to the drive train. Any experienced solution?