1996 Plymouth Voyager asd relay

Electrical problem
1996 Plymouth Voyager 6 cyl Front Wheel Drive Automatic 185.69 miles

1996 ply voyager 3.0 ltr put a new fuel pump in after about a week the van would just off and will not start for about there 3 hours I check the fuel persure all was in spec I was told to look at the asd relay and to check to crank sensor or cam sensor but I can not find a cam sensor I have new crank sensor but don't want to put it in if it wont fix it even put a new ecm from the dealer still did'nt fix it could someone help
thanks
ron