Fuel pump or???
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Elder User
Joined: Oct 2007
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From: Ishpeming Mi.
Fuel pump or???
My B-4000 decided to not start for me about 3 weeks ago. After repeated attempts the fuel pump did its 2 second cycle and the truck started right up. this has become an erratic problem ever sense. The truck, once started, doesn't suddenly shut off while I'm driving down the road [yet].
Fuel pump, relay switch, or something else?
Fuel pump, relay switch, or something else?
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Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Seeing as how you don't hear the fuel pump run for two seconds to prime the system, I agree, maybe put the under hood fuel pump power relay on your suspect list. It's located in the power distribution box. When it acts out, try thumping the relay & see if it'll wake up. Or try swapping it out for a like relay not needed to run the engine, like the AC relay & see how it goes, before buying a repalcement.
If that doesn't do it, maybe try thumping the fuel pump with a long broom handle, or thumping the fuel tank to jar the pump & see if it'll wake up.
If that doesn't do it, make sure the battey voltage is up to snuff & or that you don't have a wiring problem causing a voltage drop to the fuel pump.
A bunch of thoughts for consideration, let us know what you find.
If that doesn't do it, maybe try thumping the fuel pump with a long broom handle, or thumping the fuel tank to jar the pump & see if it'll wake up.
If that doesn't do it, make sure the battey voltage is up to snuff & or that you don't have a wiring problem causing a voltage drop to the fuel pump.
A bunch of thoughts for consideration, let us know what you find.
Thread Starter
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Elder User
Joined: Oct 2007
Posts: 620
Likes: 0
From: Ishpeming Mi.
I hate leaving a thread unclosed, so here's the dope. It turned out to be the fuelpump relay. I determined it by giving it a coupla of good whacks, saved me over $140.00 US.
Thanks to PawPaw and wp for their clues.
Great forum, and I'm glad to contribute what I can to it.
Case closed!
Thanks to PawPaw and wp for their clues.
Great forum, and I'm glad to contribute what I can to it.
Case closed!
Last edited by bazzman1953; Jun 8, 2011 at 06:40 PM. Reason: spelling
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