tanked_darren

hi everyone,

got a 2014 FX4 with EcoBoost
127k km

recently got a misfire code and a code for misfire cylinder 2, also truck went limp mode for a few minutes.

all signs point to spark plugs, my buddy had the exact same issue around the exact same mileage on his 2011

i'm going with SP-534 Motor craft plugs gapped to .031?

i'm aware how to change them and some of the tips out there.

my question is, should I be replacing anything else other than just plugs?



Inb4 how did you get to 127k km on stock plugs

idrive

iTrader: (3)

.30

If you haven't already:
Air filter
Cabin Air Filter
Oil....

Pyzon

Huh, I don't recall having done that ever..2011 with 84000 miles,
I bet it is cruddy.

Stu Cazzo

Just an FYI...one of my friends had the exact same thing you're describing occur...and he found one of his plugs was cracked.

So...he installed all new plugs. Problem solved...except it reoccurred a short few months later.

Turns out it was a defective coil shorting the plug out causing it to crack.
In case this happens to you.

(P.S. - I replaced my plugs last year with NGK Iridiums...got an instant 2 mpg gain)

tanked_darren

they didn't put cabin air filters in 2014's


and one day I'll get around to changing the oil maybe once I hit quarter million km...

tanked_darren

interesting

I'm wary with going with non-OE spark plugs though...