well before we took my truck in to get painted it started actin up and cuttin out a little.. we changed the fuel filter and my old one was terrible.. thought that might fix it but it still does it.. goin easy on the gas at about 50mph and less is fine.. but when you floor it or get on it pretty hard it starts cuttin out.. its kinda like a "blooop.. blooop" then go type of thing.. its wierd.. any opinions on this?