Can I use 87 instead of flex-fuel?
Can I use 87 instead of flex-fuel? Flex fuel system means you can run the E85 corn gas and or the regular unleaded gas. 91 or 87 octane is fine. How does flex fuel control work in Haltech? The simplest way of achieving this is to go into the MAIN SET UP window and click on the FUEL tab, here we can select the fuel type – select “Flex Fuel”. This tells the ECU to look at the flex fuel sensor and automatically calculate the additional fuel required to provide the engine to meet the target air/fuel ratio. How does...