This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and thus not compensated for and can lean the engine out and can also allow the engine to rev happening in the same way as not desired causing brusque running. As its a mechanical malformation it tends not to direction on the anomaly lively and you can sometimes hear a hissing noise following the engine running.
Might with be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can get a quick defect locate if you unplug the meter and govern the engine without it. if the engine condition is the similar subsequently chances are the meter or the association to it is faulty. Its as well as worth cleaning the MAF sensor wires, as they can get coated considering dirt exceeding times which next offsets the reading. Use some edit cleaner or brake cleaner to spray can onto the wires to cut off the dirt upon no account adjoin the wires similar to anything as they are categorically fragile
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