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Thread: How to disable rollback idle?

  1. #1
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    How to disable rollback idle?

    I recently upgraded my clutch in my Z06 to a Monster Triple Disc, which engages in a different spot than the factory clutch (earlier as you begin to release the pedal). As a result, my rollback/hill assist is behaving really weird. Since it goes by clutch pedal position and the clutch catches earlier as I'm releasing, the rollback assist doesn't disengage right away. As a result, by the time it does, my car will lurch forward pretty violently. I'm wondering if the rollback idle can be completely disabled somehow or if the clutch pedal can somehow be relearned to work with the new clutch. I tried setting the Enable VSS to 0 mph because the description says that below that speed it will allow rollback idle to enable. In reality, it's not a "less than" threshold; it's a "less than or equal to" threshold. So, it still enables when i'm at a complete stop on enough of an incline.

    My hacky fix for now is to release the brake pedal, keep the clutch pedal all the way down, and wait for the car to start rolling backward after a couple of seconds before I start coming off the clutch. But, it takes 2-3 seconds for that to happen, so people keep beeping at me in traffic because I don't go right away. This is really irritating, and I'd really appreciate any help if anyone has encountered this before!

  2. #2
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    Have you tried setting the DISABLE VSS to zero as well?

    I know in the latest Beta under the General Tab, at least for manual Z06's, there is a Clutch Travel State Top and Bottom setting which would probably be what you are looking for.

    cpp.PNG
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  3. #3
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    Quote Originally Posted by TriPinTaZ View Post
    Have you tried setting the DISABLE VSS to zero as well?

    I know in the latest Beta under the General Tab, at least for manual Z06's, there is a Clutch Travel State Top and Bottom setting which would probably be what you are looking for.

    cpp.PNG
    I did set the disable to 0 as well. Didn't work haha. I didn't know the new beta had a clutch travel option though. I'll give that a shot. Thanks!
    Last edited by M3T1; 03-08-2021 at 09:35 AM.

  4. #4
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    So I updated my Beta, and also updated the firmware of my MPIV2, but I still don't see the clutch travel state top and bottom setting. I'm in advanced mode. What year Z06 is that?

  5. #5
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    I just replaced my stock for a monster triple in my 18 ZL1 also. I dont have the car tuned yet so I dont know if I will have the same problem, I just checked under the general tab and its showing up for me. I have version 4.8.7 I dont think its the beta version

  6. #6
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    Quote Originally Posted by M3T1 View Post
    So I updated my Beta, and also updated the firmware of my MPIV2, but I still don't see the clutch travel state top and bottom setting. I'm in advanced mode. What year Z06 is that?
    2017
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  7. #7
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    My car is a 2015. Maybe the ECMs are slightly different. I tried a clutch pedal position relearn today, but couldn't get that to work either.

  8. #8
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    Quote Originally Posted by M3T1 View Post
    My car is a 2015. Maybe the ECMs are slightly different. I tried a clutch pedal position relearn today, but couldn't get that to work either.
    I was tuning a 2018 ZL1 1LE m6 last night and there was no clutch position settings in the tune. It must be Corvette specific and maybe was not available in 2015. It is also possible HPTuners hasn't defined the parameter for the 2015. You were using the latest 4.9xxx beta right?
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  9. #9
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    Quote Originally Posted by TriPinTaZ View Post
    I was tuning a 2018 ZL1 1LE m6 last night and there was no clutch position settings in the tune. It must be Corvette specific and maybe was not available in 2015. It is also possible HPTuners hasn't defined the parameter for the 2015. You were using the latest 4.9xxx beta right?
    Yes