Engine Mechanical problem
1999 Saturn SL1 4 cyl Two Wheel Drive Manual 130000 miles

I have a saturn sl1 the engine will only start when engine is cold after it sits for a few hours if I shut it off to run inside the store it will not restart it will try to turn over and some times it will get started but only for a couple of seconds and real rough also it idols iratic some times at 750 some times at 2,000 if I just let it sit in idol for 10 15 min it will over heat any help would be great thank you,

Steve