Re: What are you doing to your WJ next?
The 4.0 isn't going to show you much with any kind of special aftermarket tune up stuff. I've had 2 of them and have tried everything from high end plugs and wires to performance chips. The best thing to do in my opinion is get a set of Champion plugs (OE) and wires and replace them. Especially if it hasn't been done in awhile. Also make sure you're up to date on all of your fluids (coolant flushes, brake fluid, transmission oil, transfer case, differentials, engine). An FIPK is always a good thing, whether it's K&N or some other brand, along with a good throttle body cleaning. A lot of times you can benefit from investing in new O2 sensors, and throttle position sensors, idle air, etc.
If you just make sure the basics are done, you'll get the most out of that motor. Hot plugs or fancy wires really don't get you anywhere. It's more about frequency of maintenance than anything. A Seafoam treatment probably wouldn't hurt either.
Tony-13 JKU Sahara, Black. LED white fender lights & signals, JW Speaker LED heads and fogs and tails, LED windshield and rear bumper lights, retrofit Homelink GD opener, LED interior lighting, shorty antenna, weathertech liners, Drake gas filler. 67 Designs phone mount, Rugged Ridge hood catches, dead pedal, ventshades, rampage windshield tie down & stops, solid stainless lugs, 20% front tint, sill guards, FMF spare delete kit, OffRoadHeros cargo top, K&N FIPK intake, Smittybilt Molle roll bar covers, and lots of carbon fiber hydrographics. ToDo list: programmer, exhaust, and a bunch of other stuff.
15 Cherokee KL Latitude Edition with cold weather package. Bone stock.
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