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I HAVE THE CODE P0301,P014,P0171
I CHANGED THE CABLE,AIR FILTER,THE INYECTOR #1 AND STILL WITH THE PROBLEM WHAT CAN I DOING NEXT
Vehicle: FORD EXPEDITON 97 4.6 4X4

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Hi there

Usually the P0171 and 174 codes caused at the same time are due to low fuel pressure or a faulty mass air flow sensor. As for the misfire code, this could be caused by an intake manifold gasket leak or a problem internally with the engine. I would do a compression test on #1

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