O'k, I am frustrated as hell! 2000 tj 4.0 My jeep started running rough at idle and it would die if you suddenly let off of the gas while driving. Then the other day it just quit running while I was driving it and would not restart. After some investigation I decided to check to see if there was fuel at the fuel rail and there was only a small dribble with ignition on or off no difference. I also could not hear the pump cycle in the tank. I replaced the fuel pump and regulator, put everything back together and it ran perfect. Perfect until I parked it back in the drive! No fuel again! Took everything apart again, no visible defects. I then hooked the pump to the power supply and cycled the ignition, the pump ran fine. Put it all back together and now f74king thing still won't run! Relays have been checked and they are all good. HELP! Any ideas could be helpful!