I have a 1991 Ford F150 Lariat XLT. I replaced the fuel lines & installed a new fuel pump. The engine turns over but it won't crank. What could be wrong with my truck?

Asked by Jan 06, 2017 at 02:30 PM about the 1991 Ford F-150 XL SB

Question type: Maintenance & Repair

The engine is getting gas but it won't crank. I replaced the fuel lines & fuel
pump but I'm still having the same problem

3 Answers

73,085

There is a fuel pressure regulator that could be the problem. You could verify by checking the fuel pressure. Let me know the size engine and I can tell you what the fuel pressure should be.

It is an L6-4.9L 4917cc 300ci MFI vin Y - OHV engine. Thank you for your help!

73,085

Fuel pressure should be 50 to 60 lbs, motor NOT running, 45 to 60 lbs with the motor running.

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