DODGE VAN KEEPS DYING on 1998 Dodge Ram Van 1500

i have replaced cap,rotor,plugs,crank sensor,cam sensor,ingition coil and the van dies when i'm drivin,usually when i come to a stop,starts cutting out then it will jump back up and and run or sometimes just quits like i turned the key off. any ideas? THANK YOU

Asked by for the 1998 Dodge Ram Van 1500
Check fuel pressure and egr valve operation.