This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and as a result not compensated for and can thin the engine out and can next allow the engine to rev stirring similar to not desired causing scratchy running. As its a mechanical malformation it tends not to slant upon the defect light and you can sometimes listen a hissing noise past the engine running.
I did re-check them tho. The master tech did extensive tests upon the expose flow meter and said it was good. considering I unplug it and rule the motor, the car runs severe and at 850ish. I can lonely guess that my extra 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 rule in the substitute of rpm though? I think it unaided adjusts it vis--vis 1k..
considering I begin the car, the engine surges occurring with 1200 and 2000 rpm put up to and forth. I untouched the IAC and the TPS when no correct in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to acclimatize the idle enthusiasm screw to lower the rpm and it would withhold for a while. Now, the engine is permanently surging to the narrowing where I cannot steer it for warning of broken to the drive train. Any experienced solution?