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Thread: Low fuel rail code P0087

  1. #1
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    Default Low fuel rail code P0087

    I have two race tunes and one keeps throwing a code. So Im guessing it demanding to much fuel. Do I take fuel out of fuel pressure base or main injection pulse? Thx
    06 LBZ CCSB
    A few bolt on's!

  2. #2
    Lifetime Member LBZoom's Avatar
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    take it out of pulse, your pulse is opening too long and the pump can maintain pressure anymore. You'll either have to bump fuel pressure or reduce pulse width. Look to maintain a 23,000 psi pressure or higher. hope this helps!
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  3. #3
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    I'll give it a shot. THX
    06 LBZ CCSB
    A few bolt on's!

  4. #4
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    How much pulse width are you commanding? You should be able to hold 3000 uS pretty easily.

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    Josh, seen one of your tunes on another forum. Is it stock safe for 06 lbz? Thx
    06 LBZ CCSB
    A few bolt on's!

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    I haven't heard of anyone having any trouble with it (I assume you mean stock engine and not stock transmission).

  7. #7
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    Stock internals. But dyno'd 546 to the wheels not to long ago. Just curious about your tune. Timing 40.9 at the end, may never reach that? Found that my shim kit was not working and replaced it with a race valve. Put a 15psi spring in the AD and BAM prob fixed.
    06 LBZ CCSB
    A few bolt on's!

  8. #8
    Lifetime Member Boost's Avatar
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    So if my race tune is throwing 87, I should not suspect a bad relief valve? Instead adjust the tune? Why does this vary from truck to truck? And please explain about the shim kit and the mod you did to get rid of 87. It can cause limp right? THANKS!
    Last edited by Boost; July 22nd, 2011 at 08:54 AM.
    TORQUE SOUTH Tuning 125 VINs programmed
    2013 Buick Verano T 400+ lb-ft tq @ 26 psi with EFILive E39A
    1/8 mile: 8.933 @ 78.6 mph - world's fastest GM Delta platform
    2012 Chevy Cruze LTZ RS 200+ lb-ft torque @ 22 psi with EFILive E78 / T76
    40,000 MILES SO FAR OF RELIABLE AND POWERFUL 30 MPG TUNE
    www.torquesouth.com / www.gmtune.com / www.tstune.com

  9. #9
    Lifetime Member Boost's Avatar
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    anyone? :(
    TORQUE SOUTH Tuning 125 VINs programmed
    2013 Buick Verano T 400+ lb-ft tq @ 26 psi with EFILive E39A
    1/8 mile: 8.933 @ 78.6 mph - world's fastest GM Delta platform
    2012 Chevy Cruze LTZ RS 200+ lb-ft torque @ 22 psi with EFILive E78 / T76
    40,000 MILES SO FAR OF RELIABLE AND POWERFUL 30 MPG TUNE
    www.torquesouth.com / www.gmtune.com / www.tstune.com

  10. #10
    Lifetime Member Boost's Avatar
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    my problem fixed by relief valve, thanks anyway
    TORQUE SOUTH Tuning 125 VINs programmed
    2013 Buick Verano T 400+ lb-ft tq @ 26 psi with EFILive E39A
    1/8 mile: 8.933 @ 78.6 mph - world's fastest GM Delta platform
    2012 Chevy Cruze LTZ RS 200+ lb-ft torque @ 22 psi with EFILive E78 / T76
    40,000 MILES SO FAR OF RELIABLE AND POWERFUL 30 MPG TUNE
    www.torquesouth.com / www.gmtune.com / www.tstune.com

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