HELP!!! I bought key fob shell and switched out insides of original fob into shell. Car wouldn't start. Doors open but no start. Thought fob needed desync but dealer said "not the problem" and if I drop $550 to diagnose they "might" be able to tell me problem. Towed it back home $550 still in my pocket and tried few things I've read. Unhooked battery, resync key and it started and died 2 times and 3rd time no start but dashlights all on. Can anyone tell me if they've experienced this and what I can do to fix. I miss driving my baby which I've had since Sep 2003.