Updated my AP on Saturday and installed on my Raptor. Went to start the engine and nothing. Engine wouldn't turn over. I really started to panic and thought I really screwed up. Tried different things but nothing worked. Called Cobb but seeing as how it was Saturday, nobody answered customer service. Called GooseTuned and got a recording. Figured I was out of a truck until Monday. Finally decided to uninstall the tune to factory settings and then reinstall the tune. Engine still wouldn't turn over. In the meantime, GooseTuned saw that he had a couple of missed calls and called me back. Great service. While we were talking and he was trying to give me ideas to what was going on , I decided to try to start it again. Bingo , starts right up. What a relief. Don't know what the problem was , but probably a mistake on my end. Anyway, love the tune but I hope that never happens again...