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Q:

where is the mass air flow sensor? on 1998 Ford Expedition

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my expedition wouldnt start the other day and i diagnost tested it and a code poped up saying manufactor control air fuel metering, not sure what that is but the truck was turning over but didnt seem like it was getting fuel, so i put a fuel pump in it but that wasnt the problem, the relay wasnt it either, and the fuse is good. so what else could it be?
(1) Answer
The truck won't start because your anti-theft system is shutting it down. I see this happen many times.