1990 YJ Feeling Sluggish and Bogs
 

So just got this Jeep its been solid for a couple months now, but recently i feel power within the jeep is sluggish and when the rpm goes too high it starts too bog a little, any suggestions on what to do would be awesome.:pcwhack:

Get two gauges. A fuel pressure gauge and a vacuum gauge. Test fuel pressure and see if it drops below spec when you Rev the throttle. Run the vacuum gauge inside the cab. On mine I have a vacuum line behind the heater controls I can connect to, and view the vacuum whenever it acts up.

When my timing chain slacked, and it would intermittently misfire, I could see the vacuum drop.