This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and correspondingly not compensated for and can lean the engine out and can in addition to permit the engine to rev taking place afterward not desired causing harsh running. As its a mechanical deformity it tends not to face upon the oddity well-ventilated and you can sometimes listen a hissing noise in the same way as the engine running.
I did re-check them tho. The master tech did extensive tests on the air flow meter and said it was good. afterward I unplug it and rule the motor, the car runs severe and at 850ish. I can by yourself guess that my extra 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 control in the every other of rpm though? I think it lonesome adjusts it just about 1k..
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you happening 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 happening and is warmed up? oftentimes in engine take steps many factors may cause the thesame symptom(s)