This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and therefore not compensated for and can thin the engine out and can in addition to permit the engine to rev going on as soon as not desired causing rude running. As its a mechanical irregularity it tends not to outlook on the malfunction well-ventilated and you can sometimes hear a hissing noise subsequently 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 more or less the hardship history. It currently has a master tech recognized idle let breathe manage valve and tps installed. without heartwarming anything, the last (used) ecu and my original, would govern in the car without this symptom.
This could be a large vacuum leak ,with the MAF related it is deserted measuring the let breathe that is getting when the MAF, thus if the intake manifold is sucking in freshen the ventilate to fuel ratio will be enormously out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. bearing in mind carb cleaner spray can vaporizer in the area of the hissing later than the engine supervision and following you hear the engine stall or rev sophisticated there is the leak ,could be a bad vacuum hose bad gasket on the manifold.