I installed a Firepower Ignition kit with DUI Livewires and Autolite double platinum Gapped at .065 (.050 Stock). Very happy eith that setup!

 

I'm at 47,000 miles. I have superchip 87 oct tune running 89 gas (10% ethonol here in iowa) . Thought it was running a little (slightly) rough so decided to try plugs. I put in E3 plugs despite contraversy in forum. I think they improved drivability. Runs smooth. Accelerates smooth. Holds speed. Very happy. Hope they hold up well.

 

give the plug wires a twist in both directions before pulling them off .

Performance Distributors Scream'n Demon + livewires makes a difference. Really notice it with SuperChips 91 tune.

I'm running 91 tune until I get regear done, more at the pump yes, but my mileage gain makes it cheaper per mile than 87. I do a lot of city/freeway driving.

Also have aFe CAI and will be putting on exhaust as soon as I get time and this damn Texas heat goes away - missed the cool window last week.

 

Okay, for those of you that have changed plugs, are you seeing any difference in MPG? I have read the threads and opinion is many different plugs used, Champion, Bosch, NGK, etc, but is there a difference other than smoother running, betetr idle? Appreciate any info, just bought my '07 several weeks ago and want to start my personal maintenance routine since I do not know what was previously done. Owned many Jeeps in the past, as always, regretted selling some, but this one I plan to keep for awhile. Info please . Thanks

 

Glad to see that the E3 spark plugs work for you. Let us know after a few thousand miles how they are doing.

Welcome to the Forum.

 

I have been running the E3 plugs for about 15000 miles and they work. I am not going to say I have better anything. Just new plugs that is it.

 

I've had horrible luck with my jeep, both fixing and mpg,

After replacing:

Spark plugs
Alternator
Starter
oil change
fluid flush
diff oils
Clutch assembly
bearing
Rotor
all break pads
Caliper
power steering pump
an alignment
and finally 10 wheel studs (this all a few months from the dealership, was second hand)


I still sit at 15.5 mpg in the city and 17 mpg on highway

6k$ into this thing and its sat for 4 months in total, but everything replaced now and I can finally get to have some fun out of it.

Plugs were just done at 152K...

 

Wow! That doesn't sound fun. Now it's time to finally use that rig!

 

With 152k on the clock, that seems reasonable.

I didn't see transmission, engine, axle, t-case, etc. In that list. I would hope for the same, longevity like that. Nice job keeping your JK alive!

 

Screamin demon coil pack
Granelli plug wires
NGK g platinum plugs capped to 0.65

I have a 2007 JK unlimited X with stock gears. 2 1/2" lift & 35" tires & no engine mods. I've driven everyday for the last month, over 1000 miles. I've filled up 3 times & averaging 17.3 mpg. On the interstate at 70 mph I'm turning around 1900 rpm & getting between 19 & 20 mpg. At 60 about 1600 rpm between 18 & 19. Definitely running smoother & more throttle response. Definitely a great improvement on the engine overall performance over mpg.