This could be an airleak after the airflow meter, any ventilate 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 along with permit the engine to rev occurring in the manner of not desired causing argumentative running. As its a mechanical anomaly it tends not to viewpoint upon the anomaly roomy and you can sometimes hear a hissing noise subsequent to the engine running.
I did re-check them tho. The master tech did extensive tests on the ventilate flow meter and said it was good. later I unplug it and manage the motor, the car runs rasping and at 850ish. I can lonesome guess that my supplementary 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 control in the alternating of rpm though? I think it isolated adjusts it vis--vis 1k..
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you going on to date upon all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms taking place and is warmed up? oftentimes in engine pretense many factors may cause the thesame symptom(s)