This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and correspondingly not compensated for and can thin the engine out and can as well as allow the engine to rev taking place subsequently not desired causing rough running. As its a mechanical deviation it tends not to perspective upon the fault well-ventilated and you can sometimes hear a hissing noise taking into account the engine running.
Might afterward be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can attain a quick anomaly find if you unplug the meter and direct the engine without it. if the engine condition is the same next chances are the meter or the association to it is faulty. Its in addition to worth cleaning the MAF sensor wires, as they can acquire coated later dirt over period which later offsets the reading. Use some door cleaner or brake cleaner to spray can onto the wires to separate the dirt on no account be next to the wires once everything as they are very fragile
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