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Legendary BFuk Member
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I would be checking for any air leaks first from split hoses, split vacuum pipes, split engine breather pipes or split induction pipes, also any valves and diaphragms that may have failed. Any air that is sucked into the engine should travel past the Air flow meter otherwise it will give you a running fault and can trigger a Airflow meter fault code.

Other factors that can contribute to this are coil packs and cam/crank shaft sensors.

Start with the first point I mentioned as this is the most common:thumbsup
 
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