This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and therefore not compensated for and can thin the engine out and can furthermore permit the engine to rev stirring afterward not desired causing coarse running. As its a mechanical irregularity it tends not to face on the deformity light and you can sometimes listen a hissing noise in the manner of 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 just about the hardship history. It currently has a master tech credited idle ventilate manage valve and tps installed. without touching anything, the last (used) ecu and my original, would run in the car without this symptom.
This could be a large vacuum leak ,with the MAF associated it is without help measuring the ventilate that is getting next the MAF, for that reason if the intake manifold is sucking in let breathe the expose to fuel ratio will be no question out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. in imitation of carb cleaner spray can spray in the place of the hissing next the engine government and in imitation of you hear the engine stall or rev highly developed there is the leak ,could be a bad vacuum hose bad gasket on the manifold.