I had trouble with 93 yj not starting. had spark but seemed to be no fuel. the only codes were 11,33, and 55. I saw on here that the fuel pump should run about 2 seconds when key comes on and it was not. Also read that sometimes you have to cycle the key on and off OR just leave the key on for a few minutes and it would start running the pump.
I went out after reading all that and left key on for about two minutes, then cycled off and on and the fuel pump came on. I cycled the pump about 4 or 5 times to build pressure on the fuel rail, came up to about 40 psi, and it started right up.
I wonder if that has been an issue in the past, when we would not run the jeep for months at a time and when we would start it, the engine would just turn over for a long time before starting.
Also on a separate issue the 4wd would not engage. I found the vacuum motor shaft was struck, took it apart and cleaned and regreased. Also found the vacuum connector had a hole rubbed in it from the top. The hole, oddly enough, was caused by the rubber cover that is supposed to be a splash guard for the vacuum motor. The connector "rubs" right up next to the guard.
Seems to be all good now.
Thanks for the great posts on this site.