This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and suitably not compensated for and can thin the engine out and can as a consequence allow the engine to rev going on subsequently not desired causing prickly running. As its a mechanical defect it tends not to face upon the oddity blithe and you can sometimes listen a hissing noise behind the engine running.
Might as well as be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a fast malformation locate if you unplug the meter and rule the engine without it. if the engine condition is the similar then chances are the meter or the connection to it is faulty. Its with worth cleaning the MAF sensor wires, as they can acquire coated behind dirt higher than get older which subsequently offsets the reading. Use some retrieve cleaner or brake cleaner to spray can onto the wires to surgically remove the dirt upon no account adjoin the wires past anything as they are certainly fragile
This could be a large vacuum leak ,with the MAF amalgamated it is single-handedly measuring the air that is getting as soon as the MAF, hence if the intake manifold is sucking in air the ventilate to fuel ratio will be entirely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. taking into consideration carb cleaner spray vaporizer in the place of the hissing later than the engine running and afterward you hear the engine stall or rev well along there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.