This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and so not compensated for and can lean the engine out and can along with allow the engine to rev happening considering not desired causing scratchy running. As its a mechanical irregularity it tends not to point upon the aberration open and you can sometimes listen a hissing noise later the engine running.
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I did re-check them tho. The master tech did extensive tests upon the expose flow meter and said it was good. like I unplug it and control the motor, the car runs scratchy and at 850ish. I can and no-one else guess that my further rebuilt ecu has an issue, or the tps needs to be re-adjusted, or anyhow my maf has died in the midst of every this. I don't think the tps has that much manage in the swap of rpm though? I think it lonesome adjusts it nearly 1k..
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you happening to date on all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms going on and is warmed up? oftentimes in engine feign many factors may cause the similar symptom(s)
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