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 thin the engine out and can next permit the engine to rev occurring later not desired causing argumentative running. As its a mechanical oddity it tends not to slant upon the idiosyncrasy well-ventilated and you can sometimes listen a hissing noise afterward the engine running.
Its plus worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a in poor health pump will every repercussion in insufficient fuel swine delivered to the engine. Might plus be worth cleaning out the idle rapidity govern motor / valve as these get clogged going on with carbon and some brake cleaner washed through helps clear things off.
Hello the TPS does have an effect upon switching the car into idle mode hence I'd recommend to create determined the throttle dish is 100% closed and not slightly ashore following carbon. and later familiarize the TPS for that reason that the IDL fasten is continuous to the E2 pin later than the throttle is closed, and retrieve circuit subsequent to the throttle is just cracked. Don't make miserable roughly any voltages, the IDL entrance is the truly important one.