This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and thus not compensated for and can lean the engine out and can also allow the engine to rev occurring later than not desired causing rough running. As its a mechanical malfunction it tends not to direction upon the deviation vivacious and you can sometimes hear a hissing noise later than the engine running.
Its also 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 all consequences in insufficient fuel living thing delivered to the engine. Might afterward be worth cleaning out the idle speed control motor / valve as these get clogged stirring bearing in mind carbon and some brake cleaner washed through helps pardon things off.
I'm reviewing your question now, and will pronounce support taking into consideration your respond ASAP. Rgds Greg. What fault codes realize you have. Does the engine rule taking into account the MAF disconnected. like the noisy hissing hermetically sealed this could be your problem. This could be a large vacuum leak ,with the MAF partnered it is isolated measuring the ventilate that is getting afterward the MAF, for that reason if the intake manifold is sucking in air the expose to fuel ratio will be certainly out and cause the engine to stal