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Thread: 12-1400 Fuel Pump Catastrophe

  1. #1

    Default 12-1400 Fuel Pump Catastrophe

    I just started my new Holley HP EFI, using the Holley pump, with a pre-filter 100 micron & post-filter 10 micron. I installed it with two separate relays and triggered them by the ECU. I had the truck running like 10 minutes or so, then the fuel pressure just dropped dramatically from 50 psi to 6. I saw that and turned the engine off. I tried to restart it, and no fuel pressure was present. I tested the wiring to see if the ECU was triggering them, and it was all fine. All external wiring was OK, and looked OK. I took the fuel pump apart and try to test it outside of the vehicle. The pump was dead, but looked just like brand new. When I disassembled it, I saw complete carnage. One of the pumps just melted completely, no plug no nothing, it was destroyed. The second one looked OK, but it was dead. I think it was full of melted plastic from the melted one. I was really surprised! My brand new pump just died in 10 minutes, and it was installed flawlessly. I want to know if someone else had a problem like this. And what possibly could go wrong?

  2. #2

    Default

    This was the carnage I talked about a sec ago:

    Click image for larger version. 

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  3. #3
    Join Date
    Dec 2009
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    Default

    Quote Originally Posted by jsusnaim View Post
    I was really surprised! My brand new pump just died in 10 minutes, and it was installed flawlessly.
    You'll have to call Holley Tech Service (Link).

    I want to know if someone else had a problem like this. And what possibly could go wrong?
    http://forums.holley.com/showthread....le-Rebuildable (Related Forum Thread)
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  4. #4
    Join Date
    Nov 2013
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    Chicago IL
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    Default

    Is this a brand new fuel system install as well? New lines? New filters, new tank?
    If so, did you clean out all the lines and tank before installing them?

    I only ask because that looks like when somebody has a clogged up filter, and then the pumps overheat & melt.
    As an example: If they were new lines, and you used a chop saw to cut them, and didn't rinse out the lines good before install, the dust created can easily clog up a fuel filter.

    Also, I would take out your fuel injectors and send them off to somebody to get them cleaned.
    When pumps fail, sometimes trash goes through the system, and can get into the fuel injectors and clog one or multiple injectors.
    Also, be sure to flush out your lines well before putting a new fuel pump back in, before you reinstall injectors, if you take time to have them cleaned.
    -Scott
    Don't forget to check out progress on my Race Car:
    Project Blasphemy - 8.07 @ 171
    Low 8 Second Street Car

  5. #5
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    Connecticut
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    Quote Originally Posted by S2H View Post
    Is this a brand new fuel system install as well? New lines? New filters, new tank?
    If so, did you clean out all the lines and tank before installing them?

    I only ask because that looks like when somebody has a clogged up filter, and then the pumps overheat & melt.
    As an example: If they were new lines, and you used a chop saw to cut them, and didn't rinse out the lines good before install, the dust created can easily clog up a fuel filter.
    I thought about that too, but he claims the installation was "flawless".
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  6. #6

    Default

    Yes, it was new filters, new fuel cell, new lines, new MagnaFuel boost referenced regulator, everything was working OK.
    Can I rebuild the fuel pump case with two new Walbro 255 pumps? Or it can't be done?

  7. #7
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    Dec 2009
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    Connecticut
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    Quote Originally Posted by jsusnaim View Post
    Can I rebuild the fuel pump case with two new Walbro 255 pumps? Or it can't be done?
    Those were Delphi fuel pumps. The newer Holley end housings are different for the Walbro fuel pumps.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  8. #8

    Default

    You will never get Holley to admit a problem.
    Here's 38 pages of junk fuel pumps.
    If you run a search, you'll find 100s more.
    http://www.yellowbullet.com/forum/sh...d.php?t=486066
    A junk product with no support. If you call Holley you can be guaranteed to be asked, "What You Did Wrong?"

  9. #9
    Join Date
    Dec 2009
    Location
    Connecticut
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    Default

    I don't doubt there were some unexplained Holley fuel pump failures, initially.
    However, a lot of these pump failures were due to the wrong fuel type usage.
    Pump gasoline requires a different (hot fuel handling) fuel pump, than E-85/Race Gas/Diesel fuel.

    The newer "pump gasoline" (hot fuel handling) Holley fuel pumps are Walbro (internally).
    The E-85/Race Gas/Diesel capable Holley fuel pumps are made be Delphi (internally).
    The newest Holley brushless fuel pumps are made by TI Automotive (internally).

    http://documents.holley.com/flyer_ho...el_systems.pdf (Holley Fuel Pump & Filter Catalog)
    http://documents.holley.com/holleyfu...ems_chart1.pdf (Holley Fuel System Selection Chart)
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

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