Technical Support
eFlexFuel is a 100% plug and play solution. Learn more details how to carry out the eFlexFuel installation process from the early stages up untill the finishing touch.


Are you looking to install your eFlexFuel product? Our 10-part series on YouTube details each step of the process, from preparation to wiring to the final steps.
  • Users with experience in simple automotive repairs and installations should be able to install eFlexFuel products
  • Our product comes with an installation guide as well as access to our YouTube series
  • If you have any questions or concerns during installation, our technical support team is here to help


Disconnecting fuel line

Assembling new fuel line

Connecting assembled fuel line

Polarity of male connectors

Installing male connectors

Installing wiring harness

Installing ground wire

Finishing installation



How much do eFlexFuel products cost?

The price of our products varies depending on which you choose. You can find information on our range of products and their pricing here. We always ship a compatible product based on your vehicle’s technical information.

Is my vehicle compatible?

eFlexFuel products are compatible with most gasoline and hybrid vehicles. The products are compatible with 1- to 8-cylinder engines and 4-stroke motorbikes with electronically controlled, multipoint fuel injection (MPI).

eFlexEco products are also available for 10-cylinder and 12-cylinder engines. An eFlexFuel product for direct injection engines is currently under development. None of our products are compatible with diesel engines.

We have a compatibility database that contains information about the viability of eFlexFuel and E85 fuel with your vehicle. You can check the compatibility of your vehicle with our tool here. Please note, your needs to be adequately maintained and in normal working order when installing an eFlexFuel product.

Can I install eFlexFuel products by myself?

eFlexFuel products are delivered with a detailed installation manual that includes photos of the installation process. If you have experience in simple automotive repairs and installations, you should be able to install the product on your own. You can also refer to our YouTube channel for install videos.

Can regular gasoline still be used?

Yes! After the installation, you can use any mixture of gasoline and ethanol fuel. The eFlexFuel device will detect the fuel mix being used in real time and adjust automatically.

Do eFlexFuel products need any adjustments?

All eFlexFuel products are ready for use after installation and do not require additional adjustments. Our eFlexPlus and eFlexPro products can be fine-tuned with the eFlexApp or eFlexTuner software.

Cold starting with E85

Cold temperatures can affect vehicle startup, especially when using solely E85. Vehicles should start normally but may need 1-3 startup attempts if temperatures are very cold. We recommend the use of engine block heaters whenever possible or adding gasoline at 5-10 percent of your tank. Old and worn ignition components can also affect cold start performance, and new spark plugs can solve cold start issues as well.

Does an eFlexFuel conversion kit affect the drivability of my vehicle?

No, your vehicle’s drivability will remain the same compared to regular fuel, however, E85 fuel will increase the power and torque of your engine.

Can eFlexFuel products be removed from my vehicle?

Yes, it is possible to remove eFlexFuel products and return the vehicle to its previous state.

Are eFlexFuel products compatible with modified vehicles?

Generally, yes. If your vehicle has performance upgrades or modifications, please consult with our technical support engineers before purchasing.

Can E85 damage my engine?

Our technology has been installed in over 20,000 vehicles, which have driven over 500 million miles in all possible driving conditions. We have never received reports of engine or component damage caused by E85.

It’s why we always verify the compatibility of your vehicle with both our eFlexFuel product and E85 fuel prior to purchase.

Additionally, we are constantly developing our products and working through durability testing. Our test vehicles, ranging from year models 1988-2020 and representing all major brands, have been driven over one million miles over the past eight years without any problems.

Can eFlexFuel products damage the engine?

There is no risk of engine failure if our products have been installed and used correctly.

Does fuel consumption increase with E85?

Due to the low energy content of ethanol and E85 compared to regular gasoline, the amount of fuel injected during each cycle is higher. Thus, consumption with E85 is approximately 20-30% higher with E85, depending on the vehicle, driving habits and the exact ethanol content in the fuel.

Please note, the vehicle’s onboard computer does not factor in the increased amount of fuel injected due to the use of fuel with higher ethanol content.

EPA and CARB approvals

We are currently working with the EPA and CARB to certify our eFlexEco products for highway use. For now, all eFlexFuel products are for off highway or competitive use only.



If you still have questions about our eFlexFuel family of products, our team of trained engineers can help.


Monday - Friday
10am - 5 pm EST

tel: 1-833-539-3835

330 East Liberty 4th Floor
Ann Arbor
Michigan, 48104