1997 dodge b2500 starting problem.

hello I have a 1997 dodge b2500 with a v6 3.9. It seems it only starts when it feels like it. I have changed the cap ,rotor, wires,plugs, coil and crank sensor. none of it helped the issue. once i get it started after trying for about 30 mins it will run fine and start fine for the rest of the day but the next morning it all starts over. please help! I need this van to make money to feed my kids!

These are typical symptoms of a bad PCM. You can test this by warming up the PCM with a hairdryer tomorrow morning before you start it up. If you warm the PCM for about 5-10 minutes and then the engine starts right up, you've confirmed the problem is the PCM.