This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and therefore not compensated for and can lean the engine out and can afterward allow the engine to rev stirring following not desired causing gruff running. As its a mechanical aberration it tends not to point of view on the aberration light and you can sometimes listen a hissing noise taking into account 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 approximately the burden history. It currently has a master tech certified idle freshen manage valve and tps installed. without distressing anything, the last (used) ecu and my original, would manage in the car without this symptom.
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