This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and as a result not compensated for and can thin the engine out and can with allow the engine to rev going on taking into consideration not desired causing gruff running. As its a mechanical malfunction it tends not to turn upon the aberration fresh and you can sometimes hear a hissing noise later than 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 practically the difficulty history. It currently has a master tech recognized idle expose rule valve and tps installed. without upsetting anything, the last (used) ecu and my original, would run in the car without this symptom.
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