99 Chrysler LHS occasionally won't start

I have a 99 Chrysler LHS that I have been having some troubles with over the past few weeks. It had been getting a power surge, or grounding out, don't know exactly which one. It finally ran its course and burned the #4 ignition coil. Replaced that coil and found out it wasn't the ignition coil because it burned the new one. Replaced the PCM with one from a 99 300, had the key reprogramed for the new PCM, drove it about 15 miles, wouldn't crank. Check engine light came on, hooked the autoscanner to it and found the camshaft sensor had malfunctioned, replaced the camshaft sensor.
Man, everything was great for a couple days, perfect, back to her old self and then drove 8 miles to town, stopped at Wal Mart, and it wouldn't start. Wait for about 10 or 20 minutes and it cranks and runs fine, no check engine light this time.
Anybody have any suggestions, or know anything it may be?? All I can figure from here is that there is a wire somewhere that is grounding the car out.:banghead:

You need to narrow down the problem. When it will not start do you have spark ? Do you have fuel ? You didn't say if you replaced the ignition wires. A bad wire will burn out the coil pack.