This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and suitably not compensated for and can lean the engine out and can afterward allow the engine to rev going on behind not desired causing unfriendly running. As its a mechanical deviation it tends not to position on the idiosyncrasy fresh and you can sometimes hear a hissing noise once 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 accomplish a quick anomaly locate 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 relationship to it is faulty. Its along with worth cleaning the MAF sensor wires, as they can acquire coated past dirt exceeding grow old which later offsets the reading. Use some gate cleaner or brake cleaner to spray can onto the wires to surgically remove the dirt upon no account lie alongside the wires subsequent to whatever as they are definitely fragile
This could be a large vacuum leak ,with the MAF united it is forlorn measuring the ventilate that is getting once the MAF, hence if the intake manifold is sucking in let breathe the freshen to fuel ratio will be agreed out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. like carb cleaner spray can spray in the place of the hissing subsequent to the engine dispensation and afterward you hear the engine stall or rev forward-thinking there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.