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Thread: Bad fuel pump?

  1. #1

    Bad fuel pump?

    Well with the motor off and ignition on, i get 50 psi but it quickly drops to 5 psi. So its makes the truck hard to start, but with the truck running i get a constant 54 psi. i just got a FPR warrantied just incase but that wasn't that. Thoughts, bad fuel pump or what.

  2. #2
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,064
    Fuel pump is on its way out. That, or you have a leak somewhere which is bleeding off after the pump primes.

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


  3. #3
    Were should I look for leaks? I havent seen anything noticeable.

  4. #4
    Join Date
    Mar 2010
    Location
    Paris, TX
    Posts
    511
    Check the hose that goes from the pump to the top of bucket assembly for cracks.
    99' Silverado RCSB Z71: 5.7L Iron LS1, 11.2:1, Custom EPS Cam, Ported 862's,Ported TB, E-Bay Cold Air, E-Bay Long Tubes, Dynomax X-Pipe Exhaust, Electric Fans, Innovative LC-1, Self Built 4L60E, Circle D Pro Single Disc, 4:10 ValueTrac


    http://www.ls1truck.com/forums/image.php?type=sigpic&userid=7887&dateline=1270435  715

  5. #5
    if its the pump, should i go stock or what.

  6. #6
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,064
    Just as well off going with a Walbro.

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


  7. #7
    I thought i read somewhere that they were having problems and failing. And witch one should i be looking at.

  8. #8
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,064
    As long as it is genuine Walbro (like Nelson or TSP sells) it will be fine.

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


  9. #9
    i dont see it on nelsons site, but i do on texas speed. Does a 130 bucks sounds right. Sounds a little cheap to me.

  10. #10
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,064
    That is the correct price. Call Nelson if you prefer to order through them. They do have them.

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


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