This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and appropriately not compensated for and can lean the engine out and can furthermore allow the engine to rev stirring subsequent to not desired causing severe running. As its a mechanical deformity it tends not to perspective upon the anomaly vivacious and you can sometimes listen a hissing noise in imitation of 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. in imitation of I unplug it and run the motor, the car runs sharp and at 850ish. I can and no-one else guess that my new rebuilt ecu has an issue, or the tps needs to be re-adjusted, or somehow my maf has died in the midst of every this. I don't think the tps has that much run in the substitute of rpm though? I think it solitary adjusts it approximately 1k..
subsequent to I begin the car, the engine surges in the works amongst 1200 and 2000 rpm put up to and forth. I untouched the IAC and the TPS taking into consideration no regulate in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to become accustomed the idle quickness screw to demean the rpm and it would withhold for a while. Now, the engine is forever surging to the point where I cannot steer it for startle of damage to the drive train. Any experienced solution?