I just purchased a 95 YJ today. I noticed a pretty strong fuel/carbon like smell, almost like it is a bad O2 sensor. On the drive home I fuel up before getting on the freeway and burned over 3/4 tank in about 150 miles. Anyone experience something like this. The engine has been rebuilt and has about 3K miles on it. I am guessing (more like hoping) it just needs a tune up.