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Thread: 2015 Z06 LT4 throttle hang

  1. #1

    2015 Z06 LT4 throttle hang

    At the end of my rope here.
    2015 Z06, F1X procharger, cam, flex, CR3.
    Rev up in neutral and it hangs up at random RPM, sometimes going up, sometimes going down.
    Put TQ model to stock. Nothing.
    Put VE model to stock. Nothing.
    Idle reserve and external load. Nothing.
    The harder I try the worse it gets.

    Please help. Willing to pay.

    tune and log attached. also stock tune I downloaded from here is attached.
    Attached Files Attached Files

  2. #2
    Tuning Addict
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    I assume sciap is still installed? Just as a quick test unplug it, set dtc's to no error then see what it does.
    2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
    2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80

    ~Greg Huggins~
    Remote Tuning Available at gh[email protected]
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  3. #3
    Its very possible that the SCIAP sensor is seeing values above 128KPA
    I have no idea what will happen when the SCIAP sensor sees boost.

    This may cause a hang as the ECU doesnt know how to get the throttle body to be back in range.
    You could try changing the SCIAP sensor for a 2 BAR sensor.
    (and adjusting the linear and offset for the SCIAP sensor)

  4. #4
    Senior Tuner edcmat-l1's Avatar
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    Problem is the SCIAP and the BARO. You'll need to break out the BARO and most likely need to do something with the SCIAP. I'd have to go back to my notes on the last F1 Z06 conversion I did. I know I had to break out the BARO and I'm pretty sure I set it up as no SCIAP.

    Check the screen shot.....
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  5. #5
    Senior Tuner Ben Charles's Avatar
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    Yep I always set these up for NA that moves a lot of air…

    Email Tunes, [email protected]
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  6. #6
    Thank you guys for the responses and suggestion. I am not sure if SCIAP is plugged in on this one (there are two sensor unplugged, pic attached). I will get Baro break-out and go from there.

    sensors.jpg

  7. #7
    Senior Tuner edcmat-l1's Avatar
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    Quote Originally Posted by MoBoost View Post
    Thank you guys for the responses and suggestion. I am not sure if SCIAP is plugged in on this one (there are two sensor unplugged, pic attached). I will get Baro break-out and go from there.

    sensors.jpg
    It looks like those are 2 map sensors. One is an early GEN3 style and the other is GEN4 but it's a 1 bar sensor by the color of the label. It looks like where the GEN4 sensor is located it would be a MAP. But you have a MAP reading in your data log so WTF LOL

    When I email tune setups like this I always ask for lots of pictures so I know how things are setup, what parts are used, etc.

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  8. #8
    Quote Originally Posted by Ben Charles View Post
    Yep I always set these up for NA that moves a lot of air…
    Putting break-out didn't affect it. Changing to NA-MAP totally fixed it.

    Thank you again!

  9. #9
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    Quote Originally Posted by MoBoost View Post
    Putting break-out didn't affect it. Changing to NA-MAP totally fixed it.

    Thank you again!
    I thought that was part of removing the sciap? Guess we all should clarified to change that particular setting cause I just reread my own post and I didn't outright say it... Sorry about that. Good you figured it out either way.
    2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
    2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80

    ~Greg Huggins~
    Remote Tuning Available at gh[email protected]
    Mobile Tuning Available for North Georgia and WNC