So I have been experiencing an occasional loss of power. I guess I would call it more of a loss in acceleration. When my jeep is completely warmed up and i've been driving for a bit, it sometimes takes FOREVER to accelerate and yes I know jeeps aren't supposed to accelerate quickly but it's just inconsistent acceleration. Sometimes it accelerates fine and sometimes not. (has nothing to do with uphill downhill, assume i'm always talking about a level surface) Also, sometimes on the highway, it won't go past 60mph on level ground and sometimes it'll go 75. It's a 97 2.5L with a 4.0 throttle body and 2.5L throttle body spacer with no bore. (yes i know it doesn't increase power) I just like the more sensitive throttle response. I just replaced the spark plug wires, spark plugs were replaced just a few months ago, cleaned the distributor contact points. Engine has 250k miles but I just did a compression test and 3 cylinders had 175psi and one had 190psi so no problems there. I have a small exhaust leak at the manifold collector. Any ideas on what the problem could be? Also if I push the accelerator pedal to the floor, it actually loses acceleration but if I hold the pedal slightly above the floor it holds its power. What's that about? Thanks in advance for any help.