I have a 98 2.5 4 banger 5 speed, 142,000 miles. The last month it has started bogging down sometimes. It will idle just fine, but every now and then(maybe 5 times in the last 4 weeks)around 2,000 RPMS it gets a bad bog in it, almost like it's out of gas, once it breaks the 2200 RPM mark it runs fine until you shift and catch that mark again. It only does it in 1st or 2nd gear and sometimes you can feel a slight hesitation in 3rd. One day it runs fine, one day it has a slight hesitation, and one day it's terrible. It is not continuous though, it may stop after 5 to 10 minutes of driving. It has no codes thrown and no check engine light. The one thing I did notice is this morning it was real bad and the humidity is very high with lots of moisture in the air. The jeep sits in a carport at night, but the carport only has a roof and 2 walls where it is attached to my house. It crossed my mind it may be getting moisture under the dist. cap. Anyone else ever have this problem?