# FlexFuel Custom Channel Source

**URL:** <https://community.ecumaster.com/t/flexfuel-custom-channel-source/939>\
**Category:** EMU PRO\
**Created:** [March 28, 2024, 11:56am UTC](https://community.ecumaster.com/t/flexfuel-custom-channel-source/939 "2024-03-28T11:56:38Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Ratbert](https://avatars.discourse-cdn.com/v4/letter/r/43a26b/32.png) [@Ratbert](https://community.ecumaster.com/u/Ratbert)\
**Post date:** [March 28, 2024, 11:56am UTC](https://community.ecumaster.com/t/flexfuel-custom-channel-source/939/1 "2024-03-28T11:56:38Z")

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I am planning out the control/telemetry electronics for a completely custom build and one thing I’ve noticed is that the FLexFuel sensor seems to be the only sensor (apart from Trigger, obviously) where you can’t select the input as a Custom Channel. For physical wiring layout reasons it would be ideal if I could have the Ethenol% delivered via CAN from a 3rd party I/O device, is this an option that is in the pipeline and/or would be trivial to implement or are there reasons why it is never going to happen? Equally useful alternative would be to allow setting source Under “Fuel-\>Railx-\>Use Flex fuel ethanol content”.

I still have a couple of months before harnesses are finalized so I’m just hoping for some direction on which way I need to plan on going.

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**Author:** ![mkowalik\_ECUMASTER](https://avatars.discourse-cdn.com/v4/letter/m/839c29/32.png) [@mkowalik\_ECUMASTER](https://community.ecumaster.com/u/mkowalik_ECUMASTER)\
**Post date:** [March 29, 2024, 1:21pm UTC](https://community.ecumaster.com/t/flexfuel-custom-channel-source/939/2 "2024-03-29T13:21:07Z")

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We will add an option to use Custom Channel as a source for Flex Fuel.

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**Author:** ![Ratbert](https://avatars.discourse-cdn.com/v4/letter/r/43a26b/32.png) [@Ratbert](https://community.ecumaster.com/u/Ratbert)\
**Post date:** [April 1, 2024, 12:59pm UTC](https://community.ecumaster.com/t/flexfuel-custom-channel-source/939/3 "2024-04-01T12:59:24Z")

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Great! Thank you. I will keep an eye on the release notes.

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**Author:** ![mkowalik\_ECUMASTER](https://avatars.discourse-cdn.com/v4/letter/m/839c29/32.png) [@mkowalik\_ECUMASTER](https://community.ecumaster.com/u/mkowalik_ECUMASTER)\
**Post date:** [May 7, 2024, 9:48am UTC](https://community.ecumaster.com/t/flexfuel-custom-channel-source/939/4 "2024-05-07T09:48:21Z")

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Flex fuel with custom value input (also from project tree CAN channels) added in version 110.