This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and therefore not compensated for and can lean the engine out and can with permit the engine to rev stirring past not desired causing scratchy running. As its a mechanical oddity it tends not to viewpoint upon the idiosyncrasy lighthearted and you can sometimes hear 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 tiny more virtually the burden history. It currently has a master tech official idle air rule valve and tps installed. without moving anything, the last (used) ecu and my original, would run in the car without this symptom.
Hello the TPS does have an effect upon switching the car into idle mode so I'd suggest to make positive the throttle dish is 100% closed and not slightly stuck when carbon. and after that get used to the TPS consequently that the IDL pin is continuous to the E2 stick next the throttle is closed, and door circuit subsequent to the throttle is just cracked. Don't trouble not quite any voltages, the IDL read is the essentially important one.