Question about Ford F-150

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1986 ford f150 starting problem. When ignition is turned on fuel pump continues to run. Engine runs rough until running temp reached.

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Fuel pump(assist pump on tank has probably failed,making the main pump in frame work hard.But if it does this on both tanks,it is probably the high pressure pump on the frame.
Could also be bad fuel pressure regulator or vacuum line going to it.
There was also a problem with some year Fords tank selector valve below the frame malfunctioning. don-ohio (:^)

Posted on Jan 02, 2017

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Posted on Jan 02, 2017

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