Perhaps this can help:
May need to find a shop with an OTC Genisys/Pegisys handheld code scanner or Chrysler DRB scanner to test all the solenoids in the system and monitor the pressure readings from the fuel tank pressure sensor/leak detection pump.
On that note, you haven't dropped the tank recently have you?
His:'00 WJ, 4.7 Limited, stock
Daily Driver: '05 SRT4, Stock turbo, 252 WHP, 321 WTQ
Hers: '03 WJ, 4.7 V8, Kolak Exhaust, IRO 3", Bilsteins, JKS TB, KOR TB Bushings, 32" Cooper ATP's