Your whole dash lights up and your 98 intrigue just shuts off then sometimes wont start?
Sounds like new engine computer time to me. Take it (if you can
get it started) to a dealer for a diagnosis. Even if you do it
yourself it will not be cheap. You could try finding an engine
controller in a junkyard and do a swap to see if that gets it, but
you will be stabbing in the dark.