This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and appropriately not compensated for and can thin the engine out and can afterward allow the engine to rev occurring bearing in mind not desired causing rough running. As its a mechanical deformity it tends not to perspective on the oddity well-ventilated 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 tell you a little more about the burden 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.
This could be a large vacuum leak ,with the MAF related it is abandoned measuring the ventilate that is getting behind the MAF, as a result if the intake manifold is sucking in freshen the let breathe to fuel ratio will be entirely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. similar to carb cleaner spray vaporizer in the area of the hissing in the same way as the engine government and bearing in mind you hear the engine stall or rev forward-thinking there is the leak ,could be a bad vacuum hose bad gasket on the manifold.