It's nice to see another ram on E85. I've ran mine for over a year on it, with just a stock tune and 100% E85 I did get a CEL for running lean but I also have a larger throttle body, I think that might have put it over the edge. Now I got the 408 stroker in it with 10:1 compression it loves the E85. Even the other night when it was in the low 30's out the truck had no hesitation starting! Dark Horse I'm sure it's your plenum gasket that's blown, really not that hard of a job, if you need help I'm in the Denver area, just send me a pm.