Flexible Fuel Vehicle Conversions
Flexible fuel vehicles (FFVs) are different from conventional gasoline vehicles because they have to accommodate the unique fuel properties of ethanol, specifically fuel blends containing up to 83% (E85). Converting a conventional gasoline vehicle to an FFV requires extensive modifications throughout the fuel system and electronic engine-control system. There are currently only a few EPA-certified FFV conversion systems available. Conversion is uncommon.
Any change to a vehicle or engine that could potentially affect exhaust or evaporative emissions requires certification with the appropriate air quality authority (EPA or CARB). See Conversions for information on regulations, codes, and standards that apply to all alternative fuel and advanced vehicle conversions.