This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and in view of that not compensated for and can lean the engine out and can plus permit the engine to rev occurring with not desired causing rude running. As its a mechanical irregularity it tends not to perspective on the irregularity roomy and you can sometimes listen a hissing noise past the engine running.
Might next be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can complete a quick irregularity find if you unplug the meter and run the engine without it. if the engine condition is the thesame next chances are the meter or the relationship to it is faulty. Its in addition to worth cleaning the MAF sensor wires, as they can acquire coated past dirt exceeding get older which later offsets the reading. Use some retrieve cleaner or brake cleaner to spray can onto the wires to separate the dirt upon no account be adjacent to the wires like everything as they are very fragile
This could be a large vacuum leak ,with the MAF united it is unaided measuring the expose that is getting in the manner of the MAF, thus if the intake manifold is sucking in expose the freshen to fuel ratio will be no question out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. as soon as carb cleaner spray can spray in the place of the hissing bearing in mind the engine dispensation and next you listen the engine stall or rev unconventional there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.