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Showing results for tags 'Fuel Pump'.
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My dad has a 1995 Ford F-150, Standard cab, long-bed, with dual fuel tanks, 4.9 liter inline-6, 5-speed, 4x4 He recently had the electric fuel pumps fail in each tank. First the front one went, he replaced that, then a few weeks later the rear one died so he replaced that one as well. He also replaced the rear fuel tank because he found one for cheap on e-bay. Now, a month or two later, the rear fuel pump appears to be failing again. When the engine is running on the rear tank, the engine sputters and has no power. Flip the switch to the front tank and the engine immediately goes back to normal. The level of fuel in the tank doesn't have any effect on the symptom. When he pulled the tanks and fuel filters, he said they looked sparkling clean inside, as if they were brand new. He doesn't believe it to be a clogged line issue because when he replaced the pumps, the condition went away, only to return a few weeks later. He has also recently replace the fuel pump switch relay to no avail. He says he gets a check engine line sometimes at highway speeds when running on the rear tank (my guess is that it is a "Lean Condition" code) but that it goes away when he slows down. The truck has about 300k miles on it. My ideas that I suggested to him, but he hasn't tried yet: Check the fuel flow out of each tank. Check the fuel flow at the Y-valve where the fuel lines from both tanks join in to one. (he's not sure if there are disconnects in this section) Any other ideas?
