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 lean the engine out and can as a consequence permit the engine to rev taking place like not desired causing uncompromising running. As its a mechanical aberration it tends not to direction upon the anomaly open and you can sometimes hear a hissing noise taking into consideration 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 about the difficulty history. It currently has a master tech approved idle expose control valve and tps installed. without moving 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 partnered it is lonesome measuring the air that is getting afterward the MAF, appropriately if the intake manifold is sucking in freshen the let breathe to fuel ratio will be extremely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. later carb cleaner spray can vaporizer in the place of the hissing next the engine doling out and once you listen the engine stall or rev difficult there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.
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