I have 56k miles and the jeep was acting really sluggish on acceleration. Also, mpgs were in the commode (even by hemi standards!!). Dealer had mentioned that I was due for 'tune up' after my last free oil change - that's the only reason I go to the dealer anymore.
Dealer wanted 400+ bucks to do the "tune up" which, afik, is basically replacing the plugs and pcv valve.
So... after some searching on this amazingly well informed forum, I decided to replace the plugs myself. Spent about 100 bucks at autozone on the following:
16 champion copper core plugs (the OEM ones)
some anti seize compound
spark plug gap tool (couldn't find the one i used 10 years ago)
fuel injector cleaner
The most expensive item was the torque wrench, but now I own one and can stop borrowing my father-in-law's ever time I need one! Plugs were like $1.50 on sale.
Took about 3 hours start to finish, but I was taking my time so I probably could do it in 2 hours if I had to do it all over again. Really easy job, just had to be patient and use lots of socket extensions! At one point, I think I had three extensions linked together to get one of the pugs out - Passenger side rear bank is the worst! Anyway, only tools I used were ratchet, 10mm socket, spark plug socket, torque wrench, lots of socket extensions. That's it. No universal joints or anything like that.
Plugs that I pulled out were full of deposits and had a gap of about .060. Recommended is .045!! Drove it today and acceleration was smoooooooth as can be! no more lurching or hesitating. And mpgs have gone up by like 2 mpg from what I can see, but I need to drive it a little more to really tell.
So.... Save yourself some cash and replace your own plugs!!
BTW - replaced the air filter too, but autozone didn't have the pcv valve.
What do you guys think? Did this pretty much cover what the dealer would have done as part of a 'tune up'??