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Re: K&N MAF Problem--awful mileage--Please Help!!
The only time I have heard of a K&N air filter causeing a MAF problem is when they are cleaned and someone sprays too much oil on it and then installs it, the oil then covers the mass airflow sensor, if you put a paper filter back in and the problem persists then I would check voltage at the plug for the MAF sensor, I believe it should have a 5 volt reference voltage
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