I have a 93 del sol si. i love it!! however, something odd has transpired. If I drive for 5-10 min, then turn it off, it doesn't start. It turns over, but won't start. I'll wait ten min- then no problem. It acts like it's flooded. Also, sometimes, after leaving it parked in the sun for 8 hours, same thing. It push-starts w/ no problem. Very weird. Is it a choke problem? Any ideas??