This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and thus not compensated for and can thin the engine out and can plus permit the engine to rev occurring when not desired causing aggressive running. As its a mechanical aberration it tends not to position upon the defect lively and you can sometimes listen a hissing noise behind 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 about the trouble history. It currently has a master tech ascribed idle freshen manage valve and tps installed. without moving anything, the last (used) ecu and my original, would rule in the car without this symptom.
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