fuel pump bad? - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 04-16-2013, 05:47 PM Thread Starter
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fuel pump bad?

94.5 7.3 turbo. i have replaced the glow plugs, gpr, uvcw an gaskets, cps, fuel bowl housing an pump in the vally with new lines between the pump an fuel bowl. truck kinda stumbled to day like it was losing fuel. so drove it a little later an its like no power pulled over an reved it up an it wouldnt rev up like there was sumthing blocking the fuel line. turned off truck opened hood an made sure the plugs were pluged in on the valve covers. cranked truck back up an it ran fine. it looks like there is an electric fuel pump on the inside of the driver side frame rail but im not sure. i wonder if its goint bad. can anybody help


94.5 f350 dually
216k miles
straight piped
intake
fuel shim
ts chip
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post #2 of 15 Old 04-16-2013, 08:57 PM
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Unless someone put in an electric pump, there wouldn't be one on that truck from the factory (are you thinking of the transfer valve?). There is only the mechanical two-stage pump in the valley. Does it have the same problem regardless of what tank it is switched to? Cheers!

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
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post #3 of 15 Old 04-17-2013, 04:10 AM Thread Starter
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i havent tried switching the tanks yet. im going to do that today


94.5 f350 dually
216k miles
straight piped
intake
fuel shim
ts chip
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post #4 of 15 Old 04-17-2013, 01:23 PM
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When mine started to go bad it started leaking fuel into the valley. It has a weep hole on the fuel pump. I d look in the valley see if its wet.

04 F350 With all the mods.
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post #5 of 15 Old 04-17-2013, 03:22 PM Thread Starter
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all that is brand new. its like the truck went into limp mode


94.5 f350 dually
216k miles
straight piped
intake
fuel shim
ts chip
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post #6 of 15 Old 04-17-2013, 05:53 PM
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You could have a problem in the tank with the pickup (that's why I asked about the switch). What is the fuel pressure while cranking? If it idles, what is the pressure at idle? Cheers!

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
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post #7 of 15 Old 04-17-2013, 06:35 PM Thread Starter
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idk . what should the psi be at cranking an running


94.5 f350 dually
216k miles
straight piped
intake
fuel shim
ts chip
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post #8 of 15 Old 04-17-2013, 07:17 PM
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25 psi minimum while cranking with a minimum 100 rpm crank speed. Fuel pressure while idling should be at least 40 psi. Cheers!

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
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post #9 of 15 Old 04-17-2013, 11:40 PM Thread Starter
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my pump is new


94.5 f350 dually
216k miles
straight piped
intake
fuel shim
ts chip
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post #10 of 15 Old 04-18-2013, 04:50 PM Thread Starter
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well i havent cher thr fuel pump psi. but driving home today in 3rd gear jus trying to keep the throttle pedel steady its like its cutting back . like maybe a loose wire. i took the pcm cable off yesterday an cleaned it an reinstalled it hopping it was jus loose. but i dont no what else to do i have got way more in it then its worth. i had it scanned an they said #2 injecter didnt buzz good?


94.5 f350 dually
216k miles
straight piped
intake
fuel shim
ts chip
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