Jakers

Everyone on this forum is great with helping out with any issues. If you have the tools and time/patience you can save yourself a TON of cash over taking it to a shop. A shop will you charge you $75-100 for a coolant flush. You can do it youself for all of $20 and it is SUPER easy... Same thing for differential fluid $100 or more.. Its a few bolts...

Things I would do first:
Oil/Filter Change (all fluids actually... coolant, diff, etc... most can be done by unscrewing a few bolts and sealing with some RTV)
Air Filter
Spark Plugs

Jakers

I need to replace my headliner as well... but this can be difficult... Do you still have the cardboard that the liner is glued onto or are you ordering that as well? My understanding is that all of the top moldings need to be taken off and then you need to remove the old cardboardish headliner, clean/scrape off all the old glue, apply new glue, apply liner, slide into place and reinstall old moldings. Headliner IMHO should be put on the back burner untill you get the basic tune ups done, that headliner wont help you any if your Jeeps not performing correctly. With that being said I think the camo headliner would be pretty badass though

black label

Jakers is 100% right on. Cosmetic stuff comes last, a bad headliner won't seize the engine and it won't cook the tranny. Make sure you are up and running mechanically before you worry about appearance items.

You are better off having it look like crap but run perfectly than look perfect but run like crap.

Jio

I agree 100%. Which spark plugs are preferred but not pricey. I don't need super high performance, my jeep is completely stock.
I am using this jeep as my daily driver and it is giving me about 300 miles to the tank. Anyway to improve this?

N20jeep

Champion

black label

I've always been a fan of Bosch platinum plus 4, however I've never used them in a jeep and they are also a little pricey.

Jakers

^x2 I went with some Bosch Plat4+ before checking this forum... could have saved a pretty penny if I would have searched the forum first.

15mpg isn't too bad. You could try running some BGK44 (I think thats what it's called) through your tank to clear out your injnectors... There is also a thread on here about an injector swap (I actually bought the injectors just haven't done the swap yet)

But replacing the plugs and a new air filter could help a little depending on how fouled up they are.

Jio

I bought the lucas fuel injector cleaner but was told to put it in before I fill up tank so I'm waiting till I am empty.

black label

Again I'm a bit new to the jeep world but has anyone here used seafoam? The folks on IB's Acura website swear by it for older high mileage engines. If jeep results are similar to Acura results, that could increase your mpg's a bit.

Jio

I've seen seafoam on a jeep thread before. There was only good things said. I just haven't bought it cause I still am not sure how that works.

SteveMongr

As for plugs, the 4.0 motor does not like fancy plugs and will tell you so.
Stick with basic Champions or NGK.

Jakers

I put sea foam through my tank to clean the lines before I install my new injectors but haven't filled up again to see if there is any improvement... I didn't get the "white smoke" they spoke of when flooring the gas. I can't "feel" a difference but it could have helped.

Jakers

^Yup.
Also get a little packet of anti-sieze. I doubt you'll need a tube of it but usually at the registers you can get a little packet for maybe a dollar, and just put a little of that around the threads.

Jio

What is that for? I have read in another thread about a brand called E3 and them being better than champion. Any opinions.

Jakers

The anti-sieze will help removing the spark plugs when you do your next tune-up. They can be a PITA... E3 mean that they have 3 points for the arc to be generated...the Bosch I ordered have 4 but as previously stated these 4.0 engines do not require that and run just as good with the champion or NGK. I think you can get them for $1.25 or $2 each as opposed to the E3 or Bosch Platnium series that are $6-$8 each... and needing 6 of them your looking at $20 max for the Champion/NGK or $50 for the other not needed brand.

The "higher end" spark plugs may work great for newer vehicles or performance vehicles but your essentially driving a badass tractor and these tractors only need the basics to survive