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 thin the engine out and can in addition to allow the engine to rev up behind not desired causing brusque running. As its a mechanical aberration it tends not to position upon the malfunction lively and you can sometimes listen a hissing noise in the manner of the engine running.
Its as a consequence 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 consequences in insufficient fuel visceral delivered to the engine. Might after that be worth cleaning out the idle swiftness govern motor / valve as these acquire clogged occurring like carbon and some brake cleaner washed through helps free things off.
I'm reviewing your ask now, and will reveal incite as soon as your respond ASAP. Rgds Greg. What deviation codes attain you have. Does the engine rule gone the MAF disconnected. following the noisy hissing unquestionable this could be your problem. This could be a large vacuum leak ,with the MAF related it is only measuring the let breathe that is getting when the MAF, therefore if the intake manifold is sucking in freshen the air to fuel ratio will be enormously out and cause the engine to stal