This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and appropriately not compensated for and can thin the engine out and can afterward permit the engine to rev in the works in the same way as not desired causing coarse running. As its a mechanical irregularity it tends not to approach on the irregularity spacious and you can sometimes listen a hissing noise gone the engine running.
Might after that be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a quick malformation find if you unplug the meter and govern the engine without it. if the engine condition is the same after that chances are the meter or the membership to it is faulty. Its plus worth cleaning the MAF sensor wires, as they can get coated next dirt exceeding period which later offsets the reading. Use some log on cleaner or brake cleaner to spray onto the wires to surgically remove the dirt on no account touch the wires past anything as they are categorically fragile
I'm reviewing your question now, and will make known back similar to your reply ASAP. Rgds Greg. What irregularity codes realize you have. Does the engine control subsequent to the MAF disconnected. in the manner of the loud hissing unquestionable this could be your problem. This could be a large vacuum leak ,with the MAF joined it is single-handedly measuring the air that is getting gone the MAF, consequently if the intake manifold is sucking in freshen the ventilate to fuel ratio will be entirely out and cause the engine to stal