pretty much what the tittle says. Does anyone know how to make an e85 flex fuel kit? or know where to get the info? I see the kits out there, but I done want to spend 400-500 dollars to get one. I'm mentioning the kits that have a circuit board inside a box then you plug into your injectors, and have a hot and ground wire. I don't mind building one, but I don't know how to do it. can I use an adjusable fuel pressure regulater to run e85?