no spark from time to time on 1994 Dodge Ram Van B350

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Idon't know what to do next. From time to time, some times daily sometimes a day or to will pass, but always come back. Short drive long drive no matter while driving city or hiway it just shuts off, no spudder just shuts off. Then maybe an hour maybe not til next morrning it starts first try. I've changed coil,fuel firter,crankshaft sensor. I could really use some help. THANKS J2times
(2) Answers