Chrysler Repair: truck idle and stallind problem, crank sensor, auto 4x4

Question

hi i have a 95 ram with a 318 auto 4x4 that idles rough and stalls once you drive it a couple of miles, then it doesn't want to start untill it sits a while.  i have given it a full tune up, new cat converter, o2.  Battery, alternator, fuel pump, coil all new within year.  I checked fuel pressure and it stays at 42psi, vaccum line all seem good, map sensor is working at right volts in and out, iac valve is working, air intake cleaned.  could this be a egr problem or a computer problem?  i am out of ideas.  your help would be greatly appreciated.  thank you so much for your time and input

Answer
I know allot of times it takes a little bit of driving to get a crank sensor to act up. It will work fine when its cold but once it starts to heat up it will shut the vehicle down until the sensor cools you can try to have a bottle of water with you locate the crank sensor and when the truck dies poor some cold water on the crank sensor area to cool it down then see if it will start. If it starts up you probably have a bad crank sensor that trick doesn't always work. I have seen allot of crank sensors act this way that were bad and people spent allot of money fixing everything else except what was wrong