This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and so not compensated for and can lean the engine out and can with permit the engine to rev taking place subsequent to not desired causing gruff running. As its a mechanical fault it tends not to slope upon the fault light and you can sometimes hear a hissing noise once the engine running.
Its moreover worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a ill pump will every upshot in insufficient fuel monster delivered to the engine. Might as a consequence be worth cleaning out the idle quickness manage motor / valve as these get clogged stirring later carbon and some brake cleaner washed through helps pardon things off.
Hello the TPS does have an effect upon switching the car into idle mode suitably I'd suggest to create clear the throttle dish is 100% closed and not slightly stuck in the manner of carbon. and subsequently acclimatize the TPS suitably that the IDL pin is continuous to the E2 attach taking into account the throttle is closed, and gate circuit in imitation of the throttle is just cracked. Don't bother not quite any voltages, the IDL get into is the in fact important one.