This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and in view of that not compensated for and can lean the engine out and can afterward permit the engine to rev happening similar to not desired causing rude running. As its a mechanical oddity it tends not to approach on the deformity roomy and you can sometimes hear a hissing noise later than the engine running.
I did re-check them tho. The master tech did extensive tests on the expose flow meter and said it was good. later than I unplug it and run the motor, the car runs unfriendly and at 850ish. I can on your own guess that my extra 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 govern in the alternative of rpm though? I think it by yourself adjusts it all but 1k..
later I begin the car, the engine surges up amid 1200 and 2000 rpm back up and forth. I untouched the IAC and the TPS considering no amend in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to get used to the idle quickness screw to lower the rpm and it would sustain for a while. Now, the engine is constantly surging to the tapering off where I cannot steer it for clock radio of damage to the drive train. Any experienced solution?