This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and correspondingly not compensated for and can thin the engine out and can as well as permit the engine to rev occurring subsequent to not desired causing severe running. As its a mechanical malfunction it tends not to perspective on the irregularity fresh and you can sometimes listen a hissing noise similar to the engine running.
Its as well as worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a below par pump will all upshot in insufficient fuel creature delivered to the engine. Might with be worth cleaning out the idle swiftness control motor / valve as these get clogged occurring with carbon and some brake cleaner washed through helps clear things off.
Hi, attain you yet obsession help? Bear in mind that the site takes a increase from you at the introduction and this is held by the site until you rate my reply at which lessening the cash is split amongst the site and the expert. I am only paid for my affect on this question if you rate my answer, using the star system at the top of the screen. please reach not forget! Thank you