This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and so not compensated for and can lean the engine out and can as well as permit the engine to rev going on as soon as not desired causing aggressive running. As its a mechanical irregularity it tends not to viewpoint upon the fault well-ventilated and you can sometimes listen a hissing noise later 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 burden history. It currently has a master tech attributed idle freshen control valve and tps installed. without touching anything, the last (used) ecu and my original, would rule in the car without this symptom.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you going on 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 up and is warmed up? oftentimes in engine sham many factors may cause the same symptom(s)