This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and suitably not compensated for and can thin the engine out and can with allow the engine to rev in the works once not desired causing scratchy running. As its a mechanical aberration it tends not to direction upon the irregularity spacious and you can sometimes hear a hissing noise like the engine running.
I did re-check them tho. The master tech did extensive tests on the let breathe flow meter and said it was good. later than I unplug it and manage the motor, the car runs sharp and at 850ish. I can single-handedly 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 rotate of rpm though? I think it abandoned adjusts it as regards 1k..
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you occurring to date upon every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms stirring and is warmed up? oftentimes in engine feign many factors may cause the similar symptom(s)