E3 Spark Plugs
Senior Member
Joined: Feb 2007
Posts: 3,711
Likes: 5
From: Rhode Island
This is a 2007 5.4L Crew Cab 4x4 Lariat with 66k miles. I went from the stock motorcraft to the E3 plug and have about 1200 miles on the new plugs.
So far I am averaging about 1 mpg better on my commute to work.
I used to get right at 17.0 with normal driving. I am now getting 18.2 with normal driving.
Drove a 5 hr highway drive last weekend... on the way there the cruise control was always between 65-70 and I averaged 20.0 MPG when I arrived. On the way home i kept it between 75-80 and averaged 19.2 mpg.
I am not sure about helping performance wise... my truck is a truck so I never really get on it anyway ( i have a race car for that). But the truck runs much smoother and my "bucking" when the motor lugged going up a hill is completely gone.
So far I am averaging about 1 mpg better on my commute to work.
I used to get right at 17.0 with normal driving. I am now getting 18.2 with normal driving.
Drove a 5 hr highway drive last weekend... on the way there the cruise control was always between 65-70 and I averaged 20.0 MPG when I arrived. On the way home i kept it between 75-80 and averaged 19.2 mpg.
I am not sure about helping performance wise... my truck is a truck so I never really get on it anyway ( i have a race car for that). But the truck runs much smoother and my "bucking" when the motor lugged going up a hill is completely gone.
How often do the COP's need replaced?? Mine has 49,100 mi is it a good idea?
Senior Member
Joined: Feb 2007
Posts: 3,711
Likes: 5
From: Rhode Island
Senior Member
Joined: Jul 2007
Posts: 2,036
Likes: 2
From: Maine
The E3's have a 100,000 K warranty, www.jegs.com will serve you well!
well i just took all of my plugs out, only broke 2, the hardest part was one coil boot came off and was stuck on the plug in the back right cylinder. I am going to put the e3's and global coils in after dinner or possibly early in the morning,.... not gonna lie, i a lil bit excited
Senior Member
Joined: Oct 2010
Posts: 348
Likes: 0
From: joplin, mo
well it sounds like you guys with the newer trucks like these plugs. I think in the near future I will try them in my 90 and see what happens. I think what ill do is fill both tanks. run one out, fill with exactly 10 gallons, run it out. change plugs to e3's put in another 10 gallons and post results. I do a mix of about 50% highway and 50% city driving so I guess it would be a real world test. ill let ya know.
ok, it is done... started the truck and it was shaking and acting like a bad misfire but it never threw a code, after a min or two the truck idled normally. and for those of you keeping track, i drove it around the block and it acted like a bad doa coil at first but after it warmed up it went away.... so as of now i believe all 8 coils from global are working
