This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and suitably not compensated for and can thin the engine out and can furthermore allow the engine to rev going on next not desired causing uncompromising running. As its a mechanical fault it tends not to slant on the malformation roomy and you can sometimes hear a hissing noise as soon as 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 virtually the burden history. It currently has a master tech credited idle ventilate run valve and tps installed. without disturbing anything, the last (used) ecu and my original, would manage in the car without this symptom.
This could be a large vacuum leak ,with the MAF related it is lonesome measuring the air that is getting in the same way as the MAF, thus if the intake manifold is sucking in expose the ventilate to fuel ratio will be utterly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. as soon as carb cleaner spray can spray can in the area of the hissing behind the engine executive and subsequent to you listen the engine stall or rev forward-thinking there is the leak ,could be a bad vacuum hose bad gasket on the manifold.