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06-10-2015, 04:55 PM
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#1 |
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Registered User
Join Date: Nov 2008
Location: kannapolis, nc
Posts: 571
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fuel pump runs all the time
My truck is a 3500 has dual tanks. Back tank has a fuel pump mounted on frame and feeds the front tank as it gets low. why they did this is beyond me. Front pump was replaced late last summer by previous owner. When I turn the key the pump comes on and turns off as it should once pressure is built up. after driving it I will get out to open the yard gate or close it and the pumps are running constantly. Is this normal?
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2000 c3500 utility bed 7.4l 5sp manual old body style. Cab and chassis 1964 GMC K10 383cu in/sm465/twin stick np205 1965 Chevy C60 1990 Chevy Bus 8.2l fuel pincher 8800 miles 1993 Ford F350 crewcab 7.3idi nonturbo ZF5 Transmission Running on WMO |
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06-10-2015, 05:40 PM
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#2 |
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Registered User
Join Date: May 2013
Location: Centerville,Ma.
Posts: 1,224
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Re: fuel pump runs all the time
What year truck? If fuel injected the pump has to run for the truck to run.
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06-10-2015, 06:29 PM
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#3 |
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Registered User
Join Date: Nov 2008
Location: kannapolis, nc
Posts: 571
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Re: fuel pump runs all the time
2000 c3500 utility bed 7.4l 5sp manual old body style. Cab and chassis
__________________
2000 c3500 utility bed 7.4l 5sp manual old body style. Cab and chassis 1964 GMC K10 383cu in/sm465/twin stick np205 1965 Chevy C60 1990 Chevy Bus 8.2l fuel pincher 8800 miles 1993 Ford F350 crewcab 7.3idi nonturbo ZF5 Transmission Running on WMO |
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06-10-2015, 10:55 PM
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#4 |
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Registered User
Join Date: Nov 2008
Location: kannapolis, nc
Posts: 571
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Re: fuel pump runs all the time
lol, nevermind. new guy to fuel injection
__________________
2000 c3500 utility bed 7.4l 5sp manual old body style. Cab and chassis 1964 GMC K10 383cu in/sm465/twin stick np205 1965 Chevy C60 1990 Chevy Bus 8.2l fuel pincher 8800 miles 1993 Ford F350 crewcab 7.3idi nonturbo ZF5 Transmission Running on WMO |
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06-11-2015, 02:53 PM
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#5 |
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Registered User
Join Date: Apr 2013
Location: GUNTERSVILLE
Posts: 621
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Re: fuel pump runs all the time
We were all new at one time. ;-) But the pump runs to keep the system pressurized. That way when the computer tells the injector to open there is pressurized fuel ready to enter the engine.
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