This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and fittingly not compensated for and can lean the engine out and can then allow the engine to rev going on taking into account not desired causing gruff running. As its a mechanical oddity it tends not to point of view on the fault lighthearted and you can sometimes hear a hissing noise taking into account the engine running.
Might furthermore be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can attain a quick anomaly find if you unplug the meter and manage the engine without it. if the engine condition is the same next chances are the meter or the connection to it is faulty. Its as a consequence worth cleaning the MAF sensor wires, as they can acquire coated in the same way as dirt more than period which later offsets the reading. Use some get into cleaner or brake cleaner to spray onto the wires to remove the dirt upon no account lie alongside the wires in the manner of everything as they are completely fragile
I'm reviewing your ask now, and will state support in the same way as your respond ASAP. Rgds Greg. What idiosyncrasy codes realize you have. Does the engine direct as soon as the MAF disconnected. subsequently the noisy hissing unquestionable this could be your problem. This could be a large vacuum leak ,with the MAF associated it is unaided measuring the expose that is getting with the MAF, consequently if the intake manifold is sucking in ventilate the let breathe to fuel ratio will be utterly out and cause the engine to stal