Try unplugging the engine computer under the hood and body computer beside passenger side kick panel and clean the connectors. I've had a couple where the connectors looked to have gotten oxidized enough to prevent a good connection. Cleaned them good and bent the pins a little so they(pins) would connect very firmly with the wiring connector. That alone can make a world of difference. After that start checking things like the engine/body grounds and like said, fuel pump connector.
Also my buddy's 99 honda accord does the same thing, shuts off while driving - due to a dying ignition switch. Wiggle the key and it fires right back up!
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Whenever I did a diagnostic on it, it would say that the ac cutout relay was faulty. Which was odd because it never came with ac.
FWIW all non-a/c mopars of that era give the a/c code when you do the check on them. A/C and non-a/c cars used the same wiring harness so that code naturally pops up, nothing to worry about.
