Thread: DoD Questions

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  1. #1 DoD Questions 
    GT Level Member Hurricane87's Avatar
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    I believe I asked this before, on the deceased GXP, and never got an answer.

    I'm getting, at best, 21 MPG, and I can't remember the last time I saw a cloud of oil smoke. Is it possible for the DoD to turn itself off?

    And i know I "shouldn't," but if I wanted to, how would I go about diagnosing the problem and reactivating it?
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  2. #2 Re: DoD Questions 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    If there is a check engine light related to that system then it could be disabled.

    Otherwise it should always be working in 3rd and 4th gear if nothing like that is happening or that it was disabled with a tune.

    If you can't feel/hear it drop 4 cylinders then I'd want it on a scan tool to see if it's really happening.

    SMGPFC Member #1
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  3. #3 Re: DoD Questions 
    GT Level Member Hurricane87's Avatar
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    The only check engine light on is a vacuum leak, but it was behaving the same before that happened. I've never really been able to fell/hear it, even on my Monte Carlo, where the DIC told me which mode it was in.

    What sort of scan tool can I use while I'm driving?
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  4. #4 Re: DoD Questions 
    GT Level Member Hurricane87's Avatar
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    Bump.....
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  5. #5 Re: DoD Questions 
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    Where is the ign coil number 7 located on a 5.3L LS4?
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  6. #6 Re: DoD Questions 
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    Quote Originally Posted by Crispy View Post
    Where is the ign coil number 7 located on a 5.3L LS4?
    Cylinder 7 is on the front bank on the far right side. 1/3/5/7 left to right on the front side.
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  7. #7 Re: DoD Questions 
    GT Level Member Hurricane87's Avatar
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    Anyone got an answer to this question?
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  8. #8 Re: DoD Questions 
    GT Level Member penright's Avatar
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    Quote Originally Posted by Hurricane87 View Post
    I'm getting, at best, 21 MPG,
    Is that bad for a GXP? Really asking, that is what I am getting.
    07 Grand Prix GXP (My Daily Driver and future toy) (120,000+)
    97 Grand Prix GT (Project Car) (178,000+)
    02 Mustang Convertible (Wife's Toy) (75,000+)
    17 Honda Civic (Wife's Daily Driver)
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  9. #9 Re: DoD Questions 
    GT Level Member Hurricane87's Avatar
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    "At best" means "45 mph in fourth gear on a surface road." Average is 17 at best. I used to average 22 on my LS4 Monte Carlo, which had the decency to tell me which mode it was in. Why that feature is missing from a more expensive car that is higher in the GM hierarchy is a mystery that will never be explained.
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  10. #10 Re: DoD Questions 
    GT Level Member Hurricane87's Avatar
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    Can anyone tell me the name of a scan tool I can use while driving? And what I should look for on that scan tool?
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  11. #11 Re: DoD Questions 
    GXP Level Member Turbocharged400sbc's Avatar
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    i use both a snapon mt2500 "red brick" and a snapon modis

    i believe the chinese GM tech2 clones are below 500$ nowadays
    ~James~ Psychotic Gearhead
    projects: 84 Cressida waGN~ 90 LN3 3800, equal length headers, T70, 89 700r4, misc parts,
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