I have a 1997 Wrangler. When I turn the key on, sometimes the gas guage goes up, sometimes it does not. When it does not, the starter turns over, but the engine does not start.
The pattern is this:
key on -- gas guage doen't move --- crank -- no start -- key off.
repeat any number of times....
key on -- gas guage moves -- crank... immediate start.
I changed the fuel pump and the relay.
What else could it be?