I don;t think it SHOULD have anything to do with it but I DID put some Stabil in there Saturday morning for the first time in awhile. I've been having problems with it sputtering until it got warm so I was thinking it may be the ethonol and had someone actually tell me that it sounded like the ethonol doing it. Any chance that I got some trash in their somewhere that when the extra injectors kicked in, it was causing that? Makes sense to me