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Thread: Breaking up under boost

  1. #11
    Join Date
    Apr 2011
    Location
    Texas
    Posts
    296
    I had a issue with my truck would only do it under a load like explained. Once it was a bad spark plug then a wire another time. Last time I had this issue I checked every
    thing I could think of Ray ended up finding that the fuel pump under WOT would start to lose fuel pressure. The fuel pump was weak it was A1000 that had been hit by a drive shaft that caused it to go bad over time. So you might check your fuel pressure under a load.
    2006 Silverado aka (Bad Bitch)
    K&N CAI, Diablo Predator, muffler delete, and a vette servo. 14.7x @ 93 mph (sold)

    1998 SS Camaro aka (Silver Bullet)
    LS6 intake, ported TB, LTs, ORY, cut out, and a pantie dropping tune by Nelson. 12.6 @ 110 mph 327 hp 347 tq

    2011 ecsb silverado aka (silver sleeper)
    forged 6.2 and a small snail

  2. #12
    Join Date
    Dec 2007
    Location
    Ponca City
    Posts
    1,617
    Fuel psi is very constant. Plugs have be changed 3 times and regapped all over. It's not even making it to 8lbs before it breaks up. Idc is like 30%. Plugs don't show sign of detonation either
    Slowest in Oklahoma...

  3. #13
    Join Date
    Dec 2011
    Location
    Savannah, ga
    Posts
    317
    guy on ls1tech has this problem and it ended up being worn out valve springs, shouldn't be to hard to inspect them, not sure how you are supposed to test the spring pressure though while they are on the truck still
    1997 RCSB, AES 390 + 4L80E transplant, F1A Procharger, #160 injectors, Magnafuel 750, Schoenfield Longtubes, 3" flowmasters, Steve Morris Bullit cam, Circle D 3k stall, Ford 9" rear, Homemade Caltrac bars.


  4. #14
    Join Date
    Dec 2007
    Location
    Ponca City
    Posts
    1,617
    These are new lunati duals
    Slowest in Oklahoma...

  5. #15
    Join Date
    Dec 2007
    Location
    Ponca City
    Posts
    1,617

  6. #16
    Join Date
    Jun 2004
    Location
    george west texas
    Posts
    3,718
    sucks to have your very own 2 step all the time....
    '13 silverado LT...stock

    '11 lt 4x4 z71..tvs1900

    '01 gmc twins 6.0 jakes 400 ladder bars w/ coilovers tuned by nelson performance

  7. #17
    Join Date
    Dec 2007
    Location
    Ponca City
    Posts
    1,617
    Well did some internal digging...here's what I found. Each pic is at a different location around the reluctor wheel...


    Slowest in Oklahoma...

  8. #18
    Join Date
    Dec 2011
    Location
    Savannah, ga
    Posts
    317
    so what does that mean? that the problem?
    1997 RCSB, AES 390 + 4L80E transplant, F1A Procharger, #160 injectors, Magnafuel 750, Schoenfield Longtubes, 3" flowmasters, Steve Morris Bullit cam, Circle D 3k stall, Ford 9" rear, Homemade Caltrac bars.


  9. #19
    Join Date
    Nov 2009
    Location
    SAN ANTONE
    Posts
    784
    ive seen that before on a truck that had a similar issue. start tearing it apart and change it
    06 rcsb, 6two, 231/235, 4.11, pacesetter, 80e, 14 bolt, Nelson tuned
    2011 rcsb 6two swap in the works with 6l90 and boost
    FARMTRUC CAN GARGLE PEANUT BUTTER

  10. #20
    Join Date
    Dec 2007
    Location
    Ponca City
    Posts
    1,617
    On the to list. Talked to crank mfg and they said to send it back and they would make it right. Still sucks.
    Slowest in Oklahoma...

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