Chrysler Repair: Stalling issue, fuel pressure regulator, camshaft sensor

Question
'94 Concord, 3.3L, 122K, intermitten stalling problem. Replaced fuel pump, fuel filter, fuel pressure regulator, ignition coil, plugs, plug wires, fuel pump relay, ASD relay, and TPS so far and it continues. The car just quits, somtimes it will restart right away and other times it takes up to 30 minutes. I checked the MAP sensor per Haynes manual, it checked O.K.; checked the fuel pump wiring from back to front for short or brake and found nothing. Might it be the starter relay? or should I be thinking fuel issue still? Please throw me any other suggestion.
Thanks!

Answer
WOW !! , did you do the wire wiggle test ?DID the crankshaft
sensor or the camshaft sensor give a fault code ??Have they been replaced,has any major work been done on the engine or trans ? Wiggle those sesor wires good
There should be a code in the engine computer,that tells you if the injectors are working fine or not,or the ignition
system is acting up
when the car fails to start, do you have fuel pressure and
a spark at the coils ?
good luck !! Im glad Im not in your shoes today !!!