another on it's way out. It seems like the expiration date hit and they all went bye-bye. My understanding is that they have about a 10 year shelf life (as long as you don't have old gas sitting in them, or have some crap run thru your fuel system). I bought mine in 1998. Your's could have been sitting around for awhile, but 10k seems a little soon to have them fail. Take care, Mark