This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and appropriately not compensated for and can lean the engine out and can then allow the engine to rev occurring later not desired causing prickly running. As its a mechanical irregularity it tends not to turn on the deviation well-ventilated and you can sometimes hear a hissing noise taking into consideration 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 get a quick deviation locate if you unplug the meter and govern the engine without it. if the engine condition is the thesame later chances are the meter or the connection to it is faulty. Its afterward worth cleaning the MAF sensor wires, as they can acquire coated in imitation of dirt more than era which then offsets the reading. Use some log on cleaner or brake cleaner to spray can onto the wires to surgically remove the dirt on no account be adjacent to the wires later than all as they are certainly fragile
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