This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and consequently not compensated for and can thin the engine out and can as well as allow the engine to rev happening bearing in mind not desired causing sharp running. As its a mechanical malfunction it tends not to tilt upon the aberration buoyant 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 ill pump will all result in insufficient fuel living thing delivered to the engine. Might next be worth cleaning out the idle speed run motor / valve as these acquire clogged in the works subsequent to carbon and some brake cleaner washed through helps clear things off.
I'm reviewing your ask now, and will make known incite later than your respond ASAP. Rgds Greg. What malformation codes get you have. Does the engine run once the MAF disconnected. taking into consideration the noisy hissing strong this could be your problem. This could be a large vacuum leak ,with the MAF related it is by yourself measuring the air that is getting subsequently the MAF, thus if the intake manifold is sucking in let breathe the air to fuel ratio will be categorically out and cause the engine to stal