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Now What

This is a discussion on Now What within the Computer & Tuning forums, part of the LSx Technical Help Section category; pulling heat bank codes. car feels being held back. performance shop says im running lean. but don't work on ls1's. ...

  1. #1
    Junior Member
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    east coast
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    black custom
    2001 formula

    Question Now What

    pulling heat bank codes.
    car feels being held back.
    performance shop says im running lean. but don't work on ls1's.
    gm runs ls1's lean from factory.
    more mods the more leaner it becomes.
    and the slower my 1/4 mile times get.
    mods-- headers, programed,intake upgrades.

    so now what?
    1.fuel pump upgrade
    2.fuel pressure regulator

  2. #2
    Senior Member Street Lethal's Avatar
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    Aug 2005
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    Old Bridge "Raceway Park" N.J.
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    1,249
    2009 Corvette ZO6

    Did you clear the codes that were set after the install....?

    Quote Originally Posted by realbadniceguy
    pulling heat bank codes.
    car feels being held back.
    performance shop says im running lean. but don't work on ls1's.
    gm runs ls1's lean from factory.
    more mods the more leaner it becomes.
    and the slower my 1/4 mile times get.
    mods-- headers, programed,intake upgrades.

    so now what?
    1.fuel pump upgrade
    2.fuel pressure regulator

  3. #3
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    don't know of heat bank codes. can you list the codes?

  4. #4
    Veteran 0rion's Avatar
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    Aug 2005
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    ohio
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    22,519

    98 Formula
    06 duramax

    ls1's come rich from the factory
    what programmer are you running?
    I would have to dig around and make sure but the O2 heater codes could be keeping you in open loop. Do you have a means to log the car to see where it's running or are you just guessing you're lean? I would say get a good tune in there and that'll fix your problems.

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