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 after that permit the engine to rev up subsequent to not desired causing rough running. As its a mechanical defect it tends not to point of view on the aberration buoyant and you can sometimes listen 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 very nearly the trouble history. It currently has a master tech endorsed idle air run valve and tps installed. without heartwarming anything, the last (used) ecu and my original, would control in the car without this symptom.
I don't have any check engine lights unless I unplug the MAF sensor. when the MAF is plugged in later the car will stall unless I put my foot upon the accelerator. There is next an intermittent popping unassailable coming at idle.