This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and as a result not compensated for and can lean the engine out and can afterward allow the engine to rev occurring afterward not desired causing brusque running. As its a mechanical oddity it tends not to approach on the aberration lighthearted and you can sometimes hear a hissing noise afterward the engine running.
I did re-check them tho. The master tech did extensive tests upon the ventilate flow meter and said it was good. in imitation of I unplug it and rule the motor, the car runs brusque and at 850ish. I can abandoned 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 all this. I don't think the tps has that much manage in the interchange of rpm though? I think it on your own adjusts it on the order of 1k..
later I start the car, the engine surges stirring in the middle of 1200 and 2000 rpm support and forth. I untouched the IAC and the TPS bearing in mind no change in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to get used to the idle readiness screw to humiliate the rpm and it would maintain for a while. Now, the engine is each time surging to the narrowing where I cannot steer it for clock radio of broken to the drive train. Any experienced solution?