Check for spark and fuel pressure
Mines did the same thing. Got it hooked up to a very expensive scanner and it would not tell me what the problem was. So I started throwing parts at it. Cap, rotor, plugs, cam sensor, crank sensor, new PCM, and still nothing. Just crank and no start. So I started tracking wires down. Turned out that the way Dodge ran the wires to the fuse box they bent the wires at a 90degree to make the wires fit. Well in time a couple wires got dry rotted and finally broke. They stopped making contact and made my truck not start only crank. And also made it to where a scanner can't read the PCM. So pop that fuse box out ( it's very easy to do ) and inspect those wires. Mines was number 87pin on fuse box that lead to the number 31 pin to the PCM. Good luck hope this works.
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