Thread: Cruise disabling at 60mph

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  1. #1 Cruise disabling at 60mph 
    GTP Level Member rperry435's Avatar
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    Tracking down this problem. No codes. No adverse driving problems. Set cruise it works up until 60mph where it will set and shut off from a second to a few seconds later

    Our TAC module is built inside the throttle body and it has a dedicated VSS wire from pcm to the throttle body. Tech 2 cruise history shut down shows "Wheel speed to high" after speaking with diagnostic Hotline that's because the TAC module sees a speed that's to high for cruise to set (not a wheel bearing issue like I originally thought, which all work perfect anyways)

    With the tech2 unfortunately I cannot see the mph it's just not an option. I'm about to try a different throttle body to make sure it's not an issue internally.

    Diagnostic Hotline also mentioned 2 cases of where the tune was a direct effect of an aftermarket tune. I'm pretty sure I had this issue before I started tuning with hptuners..

    Anyone have any thoughts?
    '04 CompG - 3.6MPS - 104s - FWI - TOGS - w/14"SlimFans - SLP RR' s - 180HF Stat - TEP SK - Aluminum Oil Pan - 4thGen ZZP Wires - LS7 Lifters - AeroForce - AEM WB - HPTuners - FBSS Air Ride
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  2. #2 Re: Cruise disabling at 60mph 
    Moderator dsmuts's Avatar
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    It's not because of the tune. My cruise works fine
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
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  3. #3 Re: Cruise disabling at 60mph 
    GTP Level Member rperry435's Avatar
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    I was just curious if anyone else has experienced it. I'm about to slap on my extra tb and see if it cures it
    '04 CompG - 3.6MPS - 104s - FWI - TOGS - w/14"SlimFans - SLP RR' s - 180HF Stat - TEP SK - Aluminum Oil Pan - 4thGen ZZP Wires - LS7 Lifters - AeroForce - AEM WB - HPTuners - FBSS Air Ride
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  4. #4 Re: Cruise disabling at 60mph 
    GrandPrix Junkie SgtMarshal's Avatar
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    My cruise control wouldn't work at all until I took it to the dealership. I dont remember what they checked but they said it was out of adjustment, which, was an easy and cheap fix.
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  5. #5 Re: Cruise disabling at 60mph 
    GTP Level Member rperry435's Avatar
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    Nothing to adjust on 04+
    '04 CompG - 3.6MPS - 104s - FWI - TOGS - w/14"SlimFans - SLP RR' s - 180HF Stat - TEP SK - Aluminum Oil Pan - 4thGen ZZP Wires - LS7 Lifters - AeroForce - AEM WB - HPTuners - FBSS Air Ride
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  6. #6 Re: Cruise disabling at 60mph 
    GTP Level Member rperry435's Avatar
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    Also tried a new throttle body same problem.
    '04 CompG - 3.6MPS - 104s - FWI - TOGS - w/14"SlimFans - SLP RR' s - 180HF Stat - TEP SK - Aluminum Oil Pan - 4thGen ZZP Wires - LS7 Lifters - AeroForce - AEM WB - HPTuners - FBSS Air Ride
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  7. #7 Re: Cruise disabling at 60mph 
    GT Level Member Madness's Avatar
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    My 05 GT cruise control randomly shuts off and will not also stay engaged occasionally . Any ideas where to start looking?
    Favorite Quote: You can't fix stupid!!


    http://www.youtube.com/watch?v=0gxKStPXyn8
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  8. #8 Re: Cruise disabling at 60mph 
    GTP Level Member Impala131's Avatar
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    Hmmm... how much brake pedal travel disengages cruise control on this car? Maybe there is something too sensitive there.
    2003 Grand Prix GTP.... the journey begins again....
    E85 Self Tune with HPT, 80# Injectors, Gen V 3.4 pulley, SD Headers, AL605 Plugs
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  9. #9 Re: Cruise disabling at 60mph 
    GT Level Member Overkill's Avatar
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    Have you adjusted the speedometer in your tune for a different tire size?

    Email all inquiries to willoverkill@gmail.com!
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  10. #10 Re: Cruise disabling at 60mph 
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    Yo did you get this sorted? Would like to know how. I'm having a similar problem.
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  11. #11 Re: Cruise disabling at 60mph 
    GXP Level Member Timing's Avatar
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    I had the same issue, and it was because of my tune. It was because my cruise afr was set to rich and i noticed what would happen was when my wideband would read like 11-12 afr my cruise would shutoff. I ended up setting my maf hz table to stock till about 7k+ and it fixed it.
    08 MazdaSpeed 3- Treadstone tr8l, Ebay Piping, Ported intake,Thermal gasket, Cs Injector Seals,Cobb intake/inlet, Autotech Internals, Poly mounts, Speed Daddy DP, Magnaflow CB,
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  12. #12 Re: Cruise disabling at 60mph 
    GTP Level Member Impala131's Avatar
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    Quote Originally Posted by Ginseng View Post
    I had the same issue, and it was because of my tune. It was because my cruise afr was set to rich and i noticed what would happen was when my wideband would read like 11-12 afr my cruise would shutoff. I ended up setting my maf hz table to stock till about 7k+ and it fixed it.
    Huh, were you running full-time open loop? You'd think the PCM would adjust fuel trims to compensate, unless it was pegged full lean and still not getting there.
    2003 Grand Prix GTP.... the journey begins again....
    E85 Self Tune with HPT, 80# Injectors, Gen V 3.4 pulley, SD Headers, AL605 Plugs
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