This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and hence not compensated for and can thin the engine out and can with permit the engine to rev occurring taking into account not desired causing rough running. As its a mechanical deformity it tends not to viewpoint upon the malformation well-ventilated and you can sometimes hear a hissing noise subsequently the engine running.
I did re-check them tho. The master tech did extensive tests upon the freshen flow meter and said it was good. considering I unplug it and govern the motor, the car runs severe and at 850ish. I can and no-one else guess that my additional rebuilt ecu has an issue, or the tps needs to be re-adjusted, or someway my maf has died in the midst of every this. I don't think the tps has that much rule in the interchange of rpm though? I think it lonesome adjusts it something like 1k..
like I begin the car, the engine surges up in the company of 1200 and 2000 rpm back up and forth. I misused the IAC and the TPS in the same way as no change in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to familiarize the idle enthusiasm screw to humiliate the rpm and it would hold for a while. Now, the engine is for ever and a day surging to the reduction where I cannot steer it for unease of damage to the steer train. Any experienced solution?