i rebuilt the rear of my xj when i did the axle swap/stretch/rear frame build, i installed a rci fuel cell. its been apart for 8 months now. i hooked it all up with the stock sending unit in the cell, i have had several posts on here asking other questions trying to track this down. i have good spark wich rules out cps, asd relays and fuel pump relays are good, ballast is bypassed, cell is grounded, i jumped the fuel relay to get constant at the pump for my tests. when i pull the pump out to test it, it runs. no fuel in lines or rail.