This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and in view of that not compensated for and can thin the engine out and can also allow the engine to rev happening taking into consideration not desired causing severe running. As its a mechanical irregularity it tends not to point of view on the oddity open and you can sometimes hear a hissing noise in the same way as the engine running.
Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me say you a little more practically the difficulty history. It currently has a master tech approved idle air manage valve and tps installed. without moving anything, the last (used) ecu and my original, would manage in the car without this symptom.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you occurring 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 going on and is warmed up? oftentimes in engine take steps many factors may cause the thesame symptom(s)