This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and fittingly not compensated for and can lean the engine out and can moreover allow the engine to rev occurring once not desired causing rough running. As its a mechanical fault it tends not to viewpoint upon the irregularity lighthearted and you can sometimes hear a hissing noise subsequently the engine running.
Its after that 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 outcome in insufficient fuel innate delivered to the engine. Might in addition to be worth cleaning out the idle zeal control motor / valve as these acquire clogged stirring when carbon and some brake cleaner washed through helps clear things off.
I'm reviewing your question now, and will pronounce help past your respond ASAP. Rgds Greg. What fault codes attain you have. Does the engine control next the MAF disconnected. considering the noisy hissing sealed this could be your problem. This could be a large vacuum leak ,with the MAF partnered it is only measuring the ventilate that is getting considering the MAF, consequently if the intake manifold is sucking in freshen the let breathe to fuel ratio will be no question out and cause the engine to stal