I had a jimmy that wouldn't start when it was hot too. But it got so bad it would cut off while running if it got heated up. It was my coolant temperature sensor.

 

i was reminded it can also be catalytic converter o2 sensor might wannacheck an see if it has build up on it, i had a jeep that had the same problem course that was back when i was 16 so it slipped my mind.

 

thanks for the help guys,if it ever stops raining mabye i can work on it,it wont fit in my garage lol

 

mine is doing somthing similar as well...let me know if you figure it out and I will do the same!
(mine will hard start or not at all when it is realy hot...once its cold its fine though)
just recently did ALL maintenence though like plugs, ALL fluids, new brakes, ball joints, new radiator and coolant, thermostat, new 33' swampers (nothing to do with starting but just wanted to mention!