Input Conflict - VSS & Flex
Thread Starter
Elite Member
iTrader: (17)
Joined: Aug 2007
Posts: 2,954
Total Cats: 184
From: Knoxville, TN
I'm having a weird issue with the tune on my MS3x and I'm too dumb to figure it out myself. The car is tuned on flexfuel using the flex sensor input. It looks like the speed sensor is set up on the tableswitch input. For some reason I've been unable to use both of them at the same time.
I can disable dual fuel and turn the VSS on.
I can disable VSS and turn dual fuel on.
When both are turned on I get this error:

I've tried messing with settings as much as I could and haven't been able to get both working. I realize this seems obnoxious since they both obviously work independently and they certainly don't appear to be using the same input, but I'm lost. Any help would be greatly appreciated.
Also... another minor issue but figured I'd mention it as well. I get a Units mismatch error for fuel and spark maps 2 & 4, which I can't even figure out how to enable, when I load tunerstudio. So any suggestions on that would be great as well.
I can disable dual fuel and turn the VSS on.
I can disable VSS and turn dual fuel on.
When both are turned on I get this error:

I've tried messing with settings as much as I could and haven't been able to get both working. I realize this seems obnoxious since they both obviously work independently and they certainly don't appear to be using the same input, but I'm lost. Any help would be greatly appreciated.
Also... another minor issue but figured I'd mention it as well. I get a Units mismatch error for fuel and spark maps 2 & 4, which I can't even figure out how to enable, when I load tunerstudio. So any suggestions on that would be great as well.
Joined: Apr 2014
Posts: 18,643
Total Cats: 1,870
From: Beaverton, USA
Try this.
Go to Table Choices->Table Switch/Dual Fuel.
Set Mode to Switching.
Change the input pin to PE2 Flex
Switch back to Flex Blend mode and enable VSS.
Report back.
Go to Table Choices->Table Switch/Dual Fuel.
Set Mode to Switching.
Change the input pin to PE2 Flex
Switch back to Flex Blend mode and enable VSS.
Report back.
Thread Starter
Elite Member
iTrader: (17)
Joined: Aug 2007
Posts: 2,954
Total Cats: 184
From: Knoxville, TN
I did what you said, got a different error this time, but it pointed me in the right direction.

With the new settings apparently the fuel input is conflicting with itself now. At least that told me that the deactivated table switching pin was somehow causing the conflict. I switched the input pin to Nitrous In (something I assumed wasn't in use and I wasn't planning to ever use), then switched back to Flex Blending and everything is working great.

Thanks so much for the help Aidand. I probably shouldn't have waited a year and a half to ask for help with that, it's nice to have my VSS back.

With the new settings apparently the fuel input is conflicting with itself now. At least that told me that the deactivated table switching pin was somehow causing the conflict. I switched the input pin to Nitrous In (something I assumed wasn't in use and I wasn't planning to ever use), then switched back to Flex Blending and everything is working great.

Thanks so much for the help Aidand. I probably shouldn't have waited a year and a half to ask for help with that, it's nice to have my VSS back.






