So have a new used jeep i got 2 months ago. I have gone through everything I can think of to make it preform better. i don't have a lot of money so all these things are small and stuff I can do. I was wondering if there is anything I missed

Heres the list:
oil filter/oil change
new brake line
check tire pressure
fill all fluids
clean up engine.
replaced pcv valve and connections to air filter
new air filter
new muffler


Anything else??

 

Check all the belts and plugs to make sure they're okay.

 

I don't really have any advise for making the Jeep 4.0 perform better, as it is NOT a high performance engine. I do know how to make it last.

Start here:
Plugs and Wires
Distributor cap and Rotor
Change serpentine belt
Change Tranny fluid and filter
Change fluid on Transfer Case
Change oil in both Differentials
Change brake fluid.
Flush and fill cooling system, change the thermostat, use 195 deg.
Check ALL bushings, bolts and Tierod end in front end.
Check ALL U-joints
Check wheel bearings
Check ALL 5 shock absorbers. Replace front and rear in pairs and stablizer if needed.

When you complete this list, check and repair everything else on the Jeep.

 

I will, thanks i think i'm going to go out and get some new plugs this weekend then work my way down the list. Is there anything else?