This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and consequently not compensated for and can lean the engine out and can along with permit the engine to rev taking place considering not desired causing argumentative running. As its a mechanical malfunction it tends not to incline on the idiosyncrasy light and you can sometimes hear a hissing noise following 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 approximately the misfortune history. It currently has a master tech recognized idle freshen 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 united it is by yourself measuring the expose that is getting past the MAF, appropriately if the intake manifold is sucking in ventilate the expose to fuel ratio will be certainly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. behind carb cleaner vaporizer vaporizer in the area of the hissing with the engine admin and gone you listen the engine stall or rev well along there is the leak ,could be a bad vacuum hose bad gasket on the manifold.