My 95' jeep 4.0L Wrangler Can barely make it up hills?

[palumbomikeq]

It has a 4 inch lift and 33 inch tires. I try to go up hills, on the road but it just doesn't have enough power so i have to shift way down. I can only just crawl up it at 25 mph. Whats wrong with it? My friend has a jeep with 32 inch tires with the same gear ratio can go up the hill just fine.

 

[mybuttstinks2008]

Sounds like your exhaust is plugged up.
My 4 banger YJ is on 33's with stock gears and climbs fine.