This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and hence not compensated for and can lean the engine out and can next allow the engine to rev taking place later not desired causing prickly running. As its a mechanical deformity it tends not to slope on the defect spacious and you can sometimes listen a hissing noise similar to 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 tiny more roughly the hardship history. It currently has a master tech credited idle let breathe control valve and tps installed. without moving anything, the last (used) ecu and my original, would direct in the car without this symptom.
I don't have any check engine lights unless I unplug the MAF sensor. behind the MAF is plugged in later the car will stall unless I put my foot upon the accelerator. There is with an intermittent popping sound coming at idle.