Hello all. I have a 96 Jeep 4.0L with 164k miles. It runs really well, but the exhaust smells like it is running rich. It sort of smells like what older cars did when they were flooding out. But it never feels that way. It idles great and runs very well out on the road. There are NO codes either. I am sure the Jeep could use a tune-up, but I wouldn't think that would cause the exhaust to smell so strong. Does anyone have any ideas of what I could do to correct this?