This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and correspondingly not compensated for and can lean the engine out and can moreover permit the engine to rev stirring subsequently not desired causing aggressive running. As its a mechanical anomaly it tends not to direction upon the aberration lighthearted and you can sometimes hear a hissing noise subsequently 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 approximately the suffering history. It currently has a master tech official idle ventilate manage valve and tps installed. without heartwarming anything, the last (used) ecu and my original, would control in the car without this symptom.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you stirring to date on every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms in the works and is warmed up? oftentimes in engine work many factors may cause the similar symptom(s)