Have 2004 F250 Super Duty 5.4L. I was told my problem was the mass air flow sensor. It slows down n speeds up at an idol and will miss below 50 mph! I also think it may be the idle air sensor, any thoughts or opinions?

Asked by Feb 09, 2014 at 07:22 AM about the 2004 Ford F-250 Super Duty XLT 4WD Crew Cab LB

Question type: Maintenance & Repair

Have sprayed the MAS and ran sea foam, and gas line anti freeze through it multiple
times.  Engine light is on.

1 Answer

108,835

Have you had the codes read? Your local auto parts store will do this for free. If you have what are the code numbers? This will allow us to better help you.

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