replaced ecm/pcm hopefully this is the fix
Thank you so much for the reply! the mechanic had to take back the first ECM/PCM and replaced it again. This time the second one seems to be working fine, it has been 1 week so far and I am hoping the jeep continues to run without any problems. Oh and the mechanic consulted a chrysler specialist and they told him that the ECM does control the gas gauge and sure enough with this 2nd attempt at an ECM the gas gauge problem went Away...good luck to everyone out there with this problem!