Ford Expedition

timberwoof

Big Red Monster

how old is ur truck and have u ever had a tune up? right now mines at the shop, needs new spark plugs and prolly a coil or 2. this seems to be a common problem, only problem is mine wont throw the damn cel, which makes it harder for the mechanic to figure out whats wrong.

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2002 Ford Expedition Eddie Bauer

timberwoof

2006 with 85k on the clock

Big Red Monster

ohh 3 valve motor, i have heard alot about the plugs breaking off in the heads on those. i would just change the coil, my dad had the same problem with his 97. changeing the coil fixed the problem

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2002 Ford Expedition Eddie Bauer

wiley84

i had the same thing happen to my 07. you need to do a tune up on it. change the spark plugs and the coil on #7. I would recommend doing this soon before you have more problems. Over christmas we had this problem when we were traveling. wound up at two different dealerships and had three coils changed and the sprak plugs. before you get into the problems that i ran into i would do a tune up. the spark plugs can break really easy on these, the dealers use a cleaner that breaks up the carbon the on the plugs so they dont break.

Dib52

I had similar issues on my 08 but no CEL. We had to run a power balance through the OBD port to determine that cylinders 2 and 5 were the issue. Changed the coil packs on those two cylinders and problem solved. Having the info that cyl 7 is the problem, just swap it out with a new coil, about 45 bucks. With 85k on the ticker, might want to think about a full plug change, but they can be a real PITA if they decide to break like most do.

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2008 Eddie Bauer 5.4L 4x4, HyperTech Max Energy, K&N FIPK, MagnaFlow Stainless Exhaust, Truxxx Spacers 3/2, Nitto Terra Grapplers 265/70/17(for now), Heavy Duty Trailer Tow Package, 3.73 Rear

timberwoof

I've been watching several different YouTube videos on how to change out the plugs on these monstrosity of motors. Looks like its gonna take more time and patience than I'm use to having when it comes to doing tune ups. But.... It has to be done none the less. I'm just gonna have to grit my teeth and take it with a little lube.

Mikiedoo

Yeah, coils can go bad like that. It will fire ok sometime, then all of a sudden start missing, then go right back to firing fine for a short period. Definitely get it and the plugs changed.

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2001 Expy 5.4L Eddie Bauer 4x4
3" PA bodylift , 2" torsion crank , 2" coil spacers
315 75 16 Nitto Mud Grapplers on 16x10 Wideass Pacer LT polished wheels (-32mm offset ) Tinted windows

jdan

Usually when ever I pull out a misfiring coil the boot has condensation on it.
I've dried them off and put them pack with success of saving a few bucks.
But it's like 50/50 on fixing the issue.