This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and appropriately not compensated for and can thin the engine out and can next allow the engine to rev in the works similar to not desired causing coarse running. As its a mechanical irregularity it tends not to aim on the irregularity spacious and you can sometimes hear a hissing noise afterward 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 complete a fast idiosyncrasy find if you unplug the meter and control the engine without it. if the engine condition is the similar later chances are the meter or the link to it is faulty. Its then worth cleaning the MAF sensor wires, as they can acquire coated subsequently dirt higher than times which later offsets the reading. Use some right to use cleaner or brake cleaner to spray can onto the wires to cut off the dirt upon no account be next to the wires in the same way as everything as they are enormously fragile
I'm reviewing your question now, and will read out urge on as soon as your reply ASAP. Rgds Greg. What malformation codes accomplish you have. Does the engine control next the MAF disconnected. subsequently the noisy hissing sound this could be your problem. This could be a large vacuum leak ,with the MAF connected it is unaccompanied measuring the expose that is getting taking into consideration the MAF, therefore if the intake manifold is sucking in air the air to fuel ratio will be very out and cause the engine to stal