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Thread: No cruise after v8 swap

  1. #1
    Join Date
    Dec 2007
    Location
    Ponca City
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    No cruise after v8 swap

    The truck is an 04 that had a v6. The v6 was pulled and a v8 is now in its place. Everything is working fine except for the gas gauge works backwards and the cruise no longer works. What did I miss in the swap or any help to as what I need to change to make it work again would be awsome . Im lazy and enjoyed my cruise.
    Slowest in Oklahoma...

  2. #2
    Join Date
    Nov 2007
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    THE MEAN STREETS OF OKLAHOMA
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    shawn, you kept it a DBC right???? i dont remember.
    THEY CALL ME G.

    AZRAEL

    2017 RZR 1000 2 SEATER
    2023 RZR 1000 XP 4
    2008 LTZ DURAMAX 3500
    2023 300S 5.7
    2023 BUICK ENCORE[/B]

    The difference between winning and losing, is having a 2nd stage.

  3. #3
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    No sir. It's a dbw just like yours.
    Slowest in Oklahoma...

  4. #4
    Join Date
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    Quote Originally Posted by ecld_07 View Post
    No sir. It's a dbw just like yours.
    did you check the TAC
    THEY CALL ME G.

    AZRAEL

    2017 RZR 1000 2 SEATER
    2023 RZR 1000 XP 4
    2008 LTZ DURAMAX 3500
    2023 300S 5.7
    2023 BUICK ENCORE[/B]

    The difference between winning and losing, is having a 2nd stage.

  5. #5
    Join Date
    Dec 2007
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    Ponca City
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    Yep. Swapped it multiple times with the extras I have
    Slowest in Oklahoma...

  6. #6
    Join Date
    Sep 2007
    Location
    Broken Bow, OK
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    It is probably because the 4.3L uses a cruise contol module and the V8 doesn't. The wires are in different positions in the electrical center. I can check out the diagrams once I get home after this weekend if you don't find them before then.

  7. #7
    Join Date
    Dec 2007
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    Yes please do. Thanks. I'll see what I can find out to.
    Slowest in Oklahoma...

  8. #8
    Join Date
    Aug 2007
    Location
    Honeywood, Ontario
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    6,994
    I love seeing issues with these swaps. FML.
    2006 Silverado
    Little Black Bitch

  9. #9
    Join Date
    Sep 2007
    Location
    Broken Bow, OK
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    Make sure at the TAC module you are getting:

    C1 - 6 : Hot with brake
    C1- 14 : Hot with key in run, cruise switch ON
    C1- 4 : Hot with key in run, SET/COAST switch pressed
    C1- 5 : Hot with key in run, ACCEL/RESUME switch pressed.


    If not let me know which ones you are missing and we will track them down

  10. #10
    Join Date
    Sep 2007
    Location
    Broken Bow, OK
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    The fuel gauge problem is due to this:

    The LU3 (4.3L), L59 and LB7 use Full= 25 ohm Empty = 40 ohm
    All other engines use Full= 40ohm, Empty = 25 ohm

    You have 2 options:
    1. Change the sending unit out for the correct one.
    2. Reverse the table in the tune. (easiest option by far if you have a way to tune)

    I confirmed this by looking at a L59 and LM7 tune. The fuel level tables are inverse of each other.

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