I have a 97 1500 with the V8 mag, 5.9l. it will start up cold and run fine for quite some time. As soon as I turn it off however it will crank but will not start up. I've replaced crank sensor, pick up coil, and ignition coil all in hopes of resolving issue, but to no avail. Still having same issue. Any suggestions as to the cause would be extremely helpful at this point.

 

Welcome to DF Moving this to second gen ram section for ya.

Run a hair dryer on high on the PCM for a while. See if the truck will start. (starting with the truck cold.) Bet it won't.