[weigesco]

Does the car turn over and just not fire or does it not even turn over? I wasn't really sure from your post.
If it won't turn over when hot, check into the starter and also check your ground cable. I have had numerous starters that would fail due to heat soak problems. Most of these have been Chevy's (1 V-6 Regal) where the exhaust runs below the starter. A spot on the starter armature will develop a short.

If the car will turn over but not fire, I would check into the ignition module and also check to make sure that the solonoid or relay for the fuel pump is working properly.