I started having this issue about two weeks ago when I went to go get onto the highway, got into boost, car spit and sputtered and died. I threw it in neutral and continued on my trip for the day. Fast forward to the present and I am not sure what I have on my hands, is it the fuel pump? (I am running the stock pump on e85 and 60# injectors) or is it spark related (car has a increasingly hard time to start, even on top of the initial e85 cold starts issues) I am leaning out from 11.2 to 13.2 when the spit/sputtering happens when i attempt to go into any amount of boost so i am kind of thinking it's more fuel related. Someone else has suggested it could be a bad MAF sensor? how would I check that? TIA peeps