Okay jeeps driving a little different than it was, seems like it has less power now as well (that is on road manners of course my jeeps sees most all on road barely anything offroad because I dont have anything else to drive and cant afford to fix this if I break it) back to the power, seems it takes more petal to keep the jeep at highway speed. As I have a 4 banger 5 speed on 31s its easy to sense a drop in power lol. Was told the plugs were replaced before I got it, but that was a little over a year ago. Now for the sputtering, does it mostly when shifting, as in when the petals not depressed. Not sure on the specifics of it, I try to just ignore it lol. Also the jeep seems to be using a little more gas, not sure if it is related or not. Any input is appreciated.

 

Check out your injectors, run some seafoam through it. If your engine is old, don't use premium gas.

Compression test the engine, check all your plugs and see if they are burnt black.