Going out on a limb here--but I would say that you definetly need a new pump, injectors, and tune before you even think about running E-85. E-85 has a higher octane rating, but it has less enegry per gallon compared to regular unleaded---so you need more of it to go the same distance. I think it was MM&FF that did an article not that long ago about converting to E-85---I'd start there.