I have a 1991 XJ 4.0L and I have a question. I've looked through the forums on this and cant find anything. My fuel pump does not pump when i first turn the key on, once i start it, it works great. should it work right away? Also, my fuel gauge doesn't read anything and the light is on. Could this all mean my pump is going out? The only thing i found was talk of the CPS and i've replaced that. Any help would be great. Thanks all