i just bought a stock 1993 cherokee xj with 170k on it. i put full syn oil in, new air filter, new brakes all the way around, radiator flushed, 4 new tires 235/75-15, out in some fuel injector cleaner. im getting about 50-60 miles to half a tank..... i know i need to replace the damper, tie rod, steering column shaft, and sway links. would any of that contribute to bad mpg? i was going to order a new 02 sensor but cant find how many a 93 xj needs, and order some spark plugs (any recommendations?) or where should i start looking for the problem?

 

According to Rockauto, 93s only have an upstream. Use a NTK sensor.

I use Champion Copper plugs. They're cheap and the 4.0 likes them.

How does she shift? Smooth? I'd do a few transmission fluid drain/fills just for the hell of it. Use Dex/Merc.

https://www.cherokeeforum.com/f2/free-quick-fix-41821/

Check out that thread. One adjustment I'd make is that instead of opening the TB to WOT with your hands, just go press the gas pedal down...

 

Unlikely, unless your alignment is waaay off..

You have 1.

Champion coppers are the OEM. Check the gap.
NTK is another good one.

 

First thing I might suggest I'd is to run several tanks with Seafoam added to a full tank of gas. It remains one of the very best injector/carb cleaners and it works if that is a problem. Then a full tune-up the works when finished run the OBDII for any fault codes.

This is where I started when I bought my XJ after I replaced the exhaust system, windshield, driver/passenger window regulators, complete brake job everything was shot, then the lights. Oh yes these were just so it would pass inspection so I could drive it to have other things repaired instead of hauling it around on a trailer

Was a bit more than I had planned before I started on planned upgrades