This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and as a result not compensated for and can lean the engine out and can next allow the engine to rev occurring subsequent to not desired causing prickly running. As its a mechanical malformation it tends not to incline on the malfunction buoyant and you can sometimes hear a hissing noise similar to the engine running.
Might then be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can realize a quick fault locate if you unplug the meter and run the engine without it. if the engine condition is the same later chances are the meter or the connection to it is faulty. Its also worth cleaning the MAF sensor wires, as they can acquire coated next dirt over become old which then offsets the reading. Use some get into cleaner or brake cleaner to spray can onto the wires to remove the dirt upon no account be next to the wires gone all as they are definitely fragile
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