Do I need to tune my vehicle? Can I run a tune with my eFlexFuel kit?

Do I need a tune to run my eFlexFuel kit?

• Nope! No special tune is needed to run your eFlexFuel kit - stock ECU/tune is perfectly fine.
• eFlexFuel kits are designed to expand your vehicle's fueling capabilities, working with your current setup. In other words, if your vehicle is running properly on regular gas, then you will be good to start running E85 once your eFlexFuel kit is installed.

Can I run a tune with my eFlexFuel kit?

• Yes! You can run a tune with your eFlexFuel kit. However, your vehicle tune MUST be for regular gasoline (E0-E10).
• You CANNOT run an E85 vehicle tune with an eFlexFuel kit already installed. E85 tunes modify fueling - the eFlexFuel kit is already taking care of fueling.

Can I tune my eFlexPro?

• Yes, the eFlexPro system is designed to allow the user or tuner to precisely dial in fueling and AFR's.
• To fully tune the eFlexPro system, you will need a wideband sensor installed in your exhaust OR run the vehicle on a dyno.
• eFlexPro tunes ONLY adjust fueling and do not adjust timing, since the eFlexFuel kit does not directly interact with the vehicle's ECU.