so i installed my E3 plugs 4 days ago cause my jeep has been feeling a lil sluggish with 52,000 miles on her and running 33" mt's and the jk has always had a slight hesitation upon takeoff with the 6 spd manual tranny and now the hesitation is gone and the jk runs smoother. just my 2 cents of info for anyone interested.. part no. e366 at the local advanced auto parts @ 6 bucks a pop....

 

I am in favor of the plugs as well. After watching the video on Truck TV, and reading the positives from other members I switched mine out this last Friday. I only had 4500 miles on my JK.

Afterwards I did not notice any power difference, only because I already have the SC Flashpaq and am running the 87 tune. I did not expect to feel any power from them even if there is. I did notice how smooth the engine would run at idle. I no longer get the rough idle while sitting at a stop light.

I am happy with my purchase, and if they create more power / better milage all the better.

 

I have them on Little Jeep (TJ) and haved been very pleased. Will put them in Big Jeep when the time comes.

 

I have them to they really smooth out my idle even with the programmer for premium fuel.

 

I like the idea of them, but I must say my JK has always idled very smoothly. It only has 8000 miles on it though and I never run shitty gas in it.

 

i went straight to the e3's, i figured it could'nt hurt to try em and am pleased with them....i'll eventually get a programmer and after market exhaust and it should only get better...

 

27000 miles
put the e3 (e3.66) plugs in tonight
took all of 15 min
i could tell a difference as soon as i started it up
the idle was definitely smoother
i could also feel a difference when i went for a test drive
i am very happy with the results
well worth the 36 bucks

 

What size gap are you guys running? Never messed with spark plugs and was thinking of upgrading.

 

they come pregaped from the factory,i dont think that you can set the gap because the way that they are made

 

Does anyone have a write up on how to install spark plugs?