What would cause my 1999dodge1500 4x4 ram to stall & not start back up until it

Chryslers are very common to have cam or crank sensors fail. There are other things that can also cause this symptom like loss of fuel from a bad fuel pump etc. Would highly recommend taking to a qualified repair facility to have diagnostics. Intermittent problems are difficult to diagnose. Be prepared to pay for quality diagnostics to avoid costly unnecessary repairs.