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Thread: Will the TCC Settings affect my MPG

  1. #1
    Tuner in Training beav626's Avatar
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    Will the TCC Settings affect my MPG

    Ive had my car running great and shifting even better. A lot of fun to drive.

    My problem is my MPG is lower than before.

    Would it have anything to do with the TCC settings that I adjusted?

    I try to keep my foot out id it as much as possible but I can even get 20mpg on a mix of city highway driving.

    if these settings are the culprit, how do I keep crisp shifts and get my MPG back?

    Im using 100% gas

    2008 Corvette Auto

  2. #2
    Tuner in Training
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    I can't look at your tune because I'm at work, what were the 'before' settings?
    2006 Pontiac GTO, Torrid Red, M6, "LS2.5"
    - LS3 Heads; 11.5:1
    - ARH Headers
    - Magnaflow
    - Svede
    - RipShift race

    - No Lift Shift


    2012 Chevrolet Cruze, Blue Topaz Metallic, M6, 1.8
    - Stock
    - 42 MPG

  3. #3
    Tuner in Training beav626's Avatar
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    The TCC Settings were stock. I remember reading somewhere that GM set up the TCC settings to me more conservative on fuel consumption.

  4. #4
    Senior Tuner edcmat-l1's Avatar
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    Quote Originally Posted by beav626 View Post
    The TCC Settings were stock. I remember reading somewhere that GM set up the TCC settings to me more conservative on fuel consumption.
    If you didn't change them, they should have no adverse impact on the mileage. Log your TCC slip and see if it's locking up properly.

    What are the mods? Maybe there's other reasons for the low mileage.

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  5. #5
    Tuner in Training beav626's Avatar
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    On Last logging the TCC seemed to be working properly

    The mod is a mild cam and tune.

  6. #6
    I would say those look fairly higher then stock, so yes going into lockup later will definitely increase fuel consumption.
    -------------------------------------
    01 SS Red A4 #4987

  7. #7
    Tuner in Training beav626's Avatar
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    But would that affect Highway driving or just in town?

  8. #8
    Senior Tuner edcmat-l1's Avatar
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    Quote Originally Posted by beav626 View Post
    But would that affect Highway driving or just in town?
    How about posting a log of some highway driving? Include you TCC pids. Then there would be alot less guessing.

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  9. #9
    Tuner in Training beav626's Avatar
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    I will try to log some highway cruises this weekend.

  10. #10
    Tuner in Training beav626's Avatar
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    I did a cruise in D mode and logged

    Then I did a cruise in Sport Mode

    What do you think?

  11. #11
    Tuner in Training beav626's Avatar
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    Sport mode wasn't locking at highway speeds.

    I fixed that and MPG's are better.