The problem happens both warm and cold. There's no ryhme or reason that I've been able to see yet. As for the starter, it's new from Schuck's and is acctually the second new one. When the problem first started six months ago I suspected the starter, and when it started working each time after a good smack with a hammer, I was convinced. So when the new started acting up again I resorted to the hammer trick again and it worked so I exchanged it for another new one. I just put this new one on yesterday and this morning is right back to its usual goofyness. Is smacking it the hammer doing something else like completing a ground or jarring a connection somewhere. Sorry for rambling!!!