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Thread: g8 flex fuel issue

  1. 03-15-2022 #1
    JASON11WS6
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    g8 flex fuel issue

    Anyone run a flex fuel kit on a G8? I've done tons of flex fuel cars/trucks but I ran into an issue on this one. I pinned pin 40 on the black connector but I can't tell if it's reading right. My normal alcohol pid in my scanner doesn't read this ecm for some reason. So straight alcohol percentage does not show up. I've read some guys scan fuel composition sensor on these and that is reading 0hz. I turned the sensor on in the tune and if the sensor isn't connected or there is an issue you get a 40% alcohol rate and it effects the tune. I'm not getting any issues like that.
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  2. 03-16-2022 #2
    07GTS
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    did u enable the diag for it as well in fuel tab and the DTC's
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  3. 03-16-2022 #3
    JASON11WS6
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    Yes, the sensor was enabled for sure. What dtc's need to be checked?
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  4. 03-16-2022 #4
    JASON11WS6
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    I found the dtc's and turned them on but I'm still not getting any readings from the scanner.
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  5. 03-16-2022 #5
    sevinn
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    There's alcohol content and ethanol content pids. Some cars use one or the other, some use both.
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  6. 03-16-2022 #6
    JASON11WS6
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    I had both selected and nothing shows up. Also, when the sensor is turned on the commanded afr stays rock steady like it was still off.
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  7. 03-16-2022 #7
    sevinn
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    If you're not getting "0" and getting no data it's not activated. Perhaps try write entire?
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  8. 03-17-2022 #8
    07GTS
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    was the diagnostic in fuel tab enabled as well ? thats different to enabling the sensor
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  9. 03-17-2022 #9
    kevin87turbot
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    Quote Originally Posted by JASON11WS6 View Post
    I had both selected and nothing shows up. Also, when the sensor is turned on the commanded afr stays rock steady like it was still off.
    Does it throw any DTC's since you've enabled the Flex DTC's?
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  10. 03-28-2022 #10
    JASON11WS6
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    Quote Originally Posted by 07GTS View Post
    was the diagnostic in fuel tab enabled as well ? thats different to enabling the sensor
    Yes, sensor is enabled
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  11. 03-28-2022 #11
    JASON11WS6
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    Quote Originally Posted by sevinn View Post
    If you're not getting "0" and getting no data it's not activated. Perhaps try write entire?
    Worth a shot
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  12. 03-28-2022 #12
    JASON11WS6
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    Quote Originally Posted by kevin87turbot View Post
    Does it throw any DTC's since you've enabled the Flex DTC's?
    No dtc issues so far and the customer took the car for a couple weeks. He's coming back today so I'll see if anything else has popped up but when I had it there was no codes.
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  13. 03-28-2022 #13
    wildfan1976
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    Post the tune!
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  14. 03-28-2022 #14
    JASON11WS6
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    Heres the tune... Am I missing something?
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  15. 03-28-2022 #15
    radrace19
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    Quote Originally Posted by JASON11WS6 View Post
    Heres the tune... Am I missing something?
    Fuel System Tab your sensor is disabled
    -Greg
    2009 Maverick Silver G8 GXP M6 - 586hp
    Engine Mods: TVS 2300 Magnacharger ARH 1 7/8" long tubes with catted x-pipe
    Drivetrain Mods: Ram Dual Disc Clutch
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