I have a 1995 Pontiac Bonneville and it will randomly stall out while driving. It tends to happen more often when it is warm out. I have brought it to the mechanic, but they have not been able to replicate the issue. The battery cables have been replaced and the ignition module has tested good. Any ideas what could cause this? I have noticed that the engine has been running hotter then normal, but not to so hot as to cause the engine to overheat.