Hello Jeepers, this is my first post, though I have been reading (lurking) for 7 months or so. Usually I do not have enough time to do much to my Jeep, let alone post about it, however today I found time to enjoy both!
First I removed my grill and took off the silly restriction plate that covers the snorkel on my intake. Which took all of about 10-15 minutes, including removing AND replacing the factory grill.
Then I cleaned my spectre air filter and treated it for the first time. It had been on for only 6 months, but looked like it was 5 years old! Mostly due to the fact that I hit the trails at least once every 3-4 weeks. (This takes overnight, because I to wait for it to dry before treating and replacing it in the air box.)
Finally I changed out the spark plugs (copper core champions, in there when I bought it) for some Bosch "Fine Wire" Platinum plugs. Pretty funny, dealer quoted 2.25 hours to change my plugs for $247.50 ($110 per hour!), plus the charge of the plugs $32 ($4 each, dealer price), for a sub total of $279.50, plus tax ($304.66!) TO CHANGE OUT SPARK PLUGS! My actual cost? $27.43 (including tax) for the plugs ($2.99 each at O'Reilly) and some anti seizing goop ($1.25). For a savings of $277.22. And even though I was working very slowly and methodically (double and triple checking my work), it only took me 1.5 hours.
Took the Jeep out for a drive after and I noticed several things right away.
1) It did not get any louder, but it sounds deeper.
2) The time that it normally takes for the idle to settle down after starting seemed a lot shorter.
3) The throttle response at freeway speeds was very much improved.