97 2.4 caravan dies while driving

97 2.4 caravan dies while driving.
Its been going on for awhile, coded at o'riellys and autozone several times. It started with having the camshaft and crankshaft replaced. Problem solved for a few days but it always returned.It would restart a few minutes later then it got worse. I called it the 30 mile van 'cause that's all it would go before dying or not restarting immediately.
Go to the gracery store, have to wait another 30 minutes to go home. Then it started only going a few blocks before shutting down while driving. I replaced the o2 sensor, the shutoff and fuel pump relays and finally took it to a shop that engine coded it. On their advice, they said the codes were all over, jumping everywhere, we replaced the ECM. It went 5 hours driving great then died and immediately restarted. Again no dash codes. Can anyone help here?

Sounds like a chaffed wire harness touching structure. I would closely inspect any harness in the engine compartment. When it dies check for fuel and spark at the engine. Spray starting fluid in the intake as you crank it. If it starts and dies it's a fuel issue. If it doesn't even try it's a spark issue.