the injectors like to leak on the xj's the seals go out on them. the vent lines on top of the gas tank will come loose sometimes & give you that smell. check all of the hoses & fuel filter follow them down the frame & under the hood. fix it quick though fires suck.

93 xj stroked 4.2 w/4.0 head avenger supercharged 6.5" long arm 35" buckshots rubicon 44's front & rear