This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and as a result not compensated for and can lean the engine out and can afterward permit the engine to rev occurring afterward not desired causing coarse running. As its a mechanical anomaly it tends not to slope on the irregularity lively and you can sometimes hear a hissing noise as soon as 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 attain a fast deviation locate if you unplug the meter and direct the engine without it. if the engine condition is the same after that chances are the meter or the connection to it is faulty. Its also worth cleaning the MAF sensor wires, as they can get coated subsequent to dirt over period which subsequently offsets the reading. Use some right to use cleaner or brake cleaner to spray onto the wires to surgically remove the dirt upon no account adjoin the wires in the same way as all as they are certainly fragile
I'm reviewing your ask now, and will proclaim encourage afterward your respond ASAP. Rgds Greg. What aberration codes attain you have. Does the engine rule in imitation of the MAF disconnected. once the loud hissing strong this could be your problem. This could be a large vacuum leak ,with the MAF amalgamated it is single-handedly measuring the freshen that is getting in the manner of the MAF, so if the intake manifold is sucking in let breathe the let breathe to fuel ratio will be unquestionably out and cause the engine to stal