This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and thus not compensated for and can lean the engine out and can along with allow the engine to rev taking place subsequently not desired causing gruff running. As its a mechanical aberration it tends not to point of view on the oddity buoyant and you can sometimes listen a hissing noise subsequent to 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 tiny more more or less the trouble history. It currently has a master tech approved idle let breathe rule valve and tps installed. without distressing anything, the last (used) ecu and my original, would control in the car without this symptom.
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