This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and so not compensated for and can thin the engine out and can with allow the engine to rev in the works past not desired causing coarse running. As its a mechanical idiosyncrasy it tends not to direction on the irregularity lighthearted and you can sometimes listen a hissing noise once 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 little more practically the misery history. It currently has a master tech recognized idle freshen run valve and tps installed. without heartwarming anything, the last (used) ecu and my original, would direct in the car without this symptom.
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