Have a 2002 GC with a 4.0 L. Recently noticed a problem re-starting once it had been driven for a while and then sits for several hours. Plus there was a 'squeaking noise' near the tank that sounded almost like a pump oscillating on/off/on/off. Concerned the fuel pump was going bad, I changed two weeks ago. The noise is still there (maybe gone for a few days). Two days ago after driving 2-3 miles the Jeep lost power started missing and died. After sitting for a while it would restart but repeat this process. I changed the fuel pressure regulator/filter last night and drove around the block. Died 1/2 way. Finally was able to check the fuel pressure. Around 44 psi with key on - seems to hold but I didn't leave in sitting very long. Started and at idle around 54 psi. After 3-5 minutes as the Jeep reached operating temp the pressure gauge needle started vibrating very fast between approximatley 50 - 55 psi. Soon after the gauge dropped to 40, 30, 20 then to around 0-5 psi, all in about 10 seconds. Up until then the Jeep seemed to be running OK, maybe a LITTLE rougher idle, but soon after the pressure drop the idle became very rough on it died (as expected). Concerned I never really had a bad fuel pump but do now. Could there be something else causing the pump to essentially quit or drop pressure. As noted I changed the regulator/filter and the Jeep did the same thing. Thougths?
Thursday, June 7th, 2012 AT 11:49 AM