Mechanics

F-150 RUNS POOR AND LACKS POWER WHEN IT DOES START

1996 Ford F-250 • V8 2WD Automatic • 134,000 miles

1996 Ford F-150 mileage: 134,000. The problem with my truck is on starting it. I turn the key on, but do not start the truck, and the fuel pumps, does not matter which tank is selected, will continuously run. Most of the time it will shut off after several minutes, but sometimes, it wont shut off at all. My truck will not start unless they cut off. Sometimes it will, but it runs very poor, and it has very little power. The check engine light will stay on if it does happen to start with the fuel pump not shutting off. I bought a code reader to check the code, and it came up with an EGR sensor problem. Therefore, I replaced it, but it did not change anything. If the pump does cut off, my truck will start and will run fine. I have replaced the fuel pump in the front tank (it had been giving me some problems for a while), the fuel pump relay, and the fuel pressure regulator. I guess the question I really have is, what tells the fuel pump to shut off? Is there a sensor that reads the pressure, or something else in the fuel system to give the okay? To shut off. Another thing is that if I do get it started, it will usually run fine during that day, meaning if I drive if for a while, and then stop it, I can usually restart it without a problem. However, the next day, it will return to its non-starting state. I would appreciate any information or ideas you can give me on what I can do to solve this problem.

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2CarPros-Archives
February 17, 2011.



Try replacing both the fuel pumps.

Tiny
2CarPros-Archives
Feb 17, 2011.