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Old 01-11-2008, 02:26 PM   #1
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Default Fuel Pump issue, & I'm out of Ideas!!

My Bonny died over 3 weeks ago, and soon determined that it was a fuel issue. I've replaced the fuel pump TWICE. The first new one got fuel to the engine, but not much pressure. So I returned it and the 2nd new one does nothing. I've replaced the fuel pressure regulator, fuel filter and fuel pump relay, checked all the fuses, and still nothing. The pump doesn't turn on, I have absolutely no fuel at the engine.
Is there a way to test the pump to verify that it'* not a faulty pump? Otherwise, how do I go about troubleshooting what maybe an electrical issue to the fuel pump?

I need all the help I can get because my wife may kill me if I don't get my Bonny back on the road again soon![/b]
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Old 01-11-2008, 07:24 PM   #2
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Did you change the sending unit as well as the pump? This happened to me as too on my 96. It turned out to be the new sending unit, as it was wired incorrectly from the factory...

I ended up comparing the new unit with the old one, using an ohm meter to check the wiring. Turns out two of the wires were reverved on the new one. Once I switched the two wires at the connector, all was well again.

Hope that helps
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Old 01-14-2008, 03:25 PM   #3
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Isn't the sending unit and pump all 1 unit? If not, where is the sending unit?
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Old 01-14-2008, 03:37 PM   #4
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I know they are separate on the 1996, but not sure on a 2001. Perhaps someone else can chime in...
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Old 01-14-2008, 03:40 PM   #5
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If the wires are reversed the pump will go backwards and not produce much pressure at all.
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Old 01-14-2008, 03:56 PM   #6
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I just pulled the new pump, and the clear tubing that goes from the pump itself to the outlet on the top ot the pump assembly was full of fuel. This wouldn't fill just by being submerged would it? Wouldn't this mean that the pump is coming on briefly and is cutting off?
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Old 01-14-2008, 05:08 PM   #7
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Yes it could or the pump could be running backwards. Running backwards would produce a small flow a very low pressure.
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Old 01-23-2008, 02:53 PM   #8
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Default Fuel Pump issue, & I'm out of Ideas!! SOLVED!!!!

My Bonny is finally in the road again after a month.
After replacing what seems like everything in the fuel system (including 2 new fuel pumps) It turns out that it was a simple wiring problem. The wiring harness behind the passenger side rear fender had slipped down between the fender liner and the muffler heat shield, and the heat shield cut through the gray wire that supplies power to the fuel pump. After splicing the wires back together, she fired right up. Amazing how much better the fuel pump runs when it gets power .[/b]
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