Bmw Ews Ii Wiring Diagram

This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and hence not compensated for and can thin the engine out and can along with permit the engine to rev happening gone not desired causing rough running. As its a mechanical fault it tends not to outlook upon the deformity buoyant and you can sometimes hear a hissing noise later the engine running.

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Might furthermore be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can complete a fast anomaly locate if you unplug the meter and run the engine without it. if the engine condition is the similar then chances are the meter or the association to it is faulty. Its also worth cleaning the MAF sensor wires, as they can get coated considering dirt over times which then offsets the reading. Use some admittance cleaner or brake cleaner to spray can onto the wires to remove the dirt upon no account adjoin the wires taking into account everything as they are utterly fragile

have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you occurring to date upon every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms up and is warmed up? oftentimes in engine affect many factors may cause the thesame symptom(s)

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