what is a COP????
New User
Joined: Feb 2010
Posts: 7
Likes: 0
No, not motorcraft, yet, so far duralast and masterpro, thy are cracking just above the boot on the plastic housing. Was told last night that once you replace 1 you have to do them all, so if that the case that kinda sucks.
Mountain Pass
Joined: Dec 2009
Posts: 196
Likes: 1
From: Central NY
Ours didn't. One of the coils went dead completely and it ran on 7 cylinders for a week and about 300 miles (happened during a trip). No codes or check engine light.
New User
Joined: Feb 2010
Posts: 7
Likes: 0
Yeah, hooked it up to one of Oriellys readers and its saying coil in 10th cylinder, just replaced it again and the engine light went off for a few, then it started missing again, pulled the coil and no crack. So now Im wondering if its just a bad plug and thats somehow nuking the coil. No clue why you would have to change all of them, just what a buddy of mine told me.
Last edited by slucas14; Feb 6, 2010 at 02:08 PM. Reason: Wanted to add somthing.
Logistics Pro
Joined: Aug 2007
Posts: 3,974
Likes: 17
From: Millersburg, OH
No need to change all the coils out. Nothing will be gained except an empty pocket book. You should however replace all the boots when doing a plug change or if you suspect age is starting to be an issue.
As far as replacement coils most guys are going to recommend Motorcraft replacement.
As far as replacement coils most guys are going to recommend Motorcraft replacement.
New User
Joined: Feb 2010
Posts: 7
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Postmaster
Joined: Mar 2008
Posts: 4,158
Likes: 0
From: Paramount, Ca
IDK on that v10 but I know on the 4.6L and the 5.4L I find the last 2 cylinders the plug is cracked or lose often. I guess since it's hard to get in there people try releasing it with needle nose pliers or something and break the clip. That's what happened on the last two expeditions I've worked on. The previous mechanic broke the clip causing them to misfire once the plug losens.
Elder User
Joined: Dec 2006
Posts: 594
Likes: 0
From: New Jersey
I agree...Absolutely not, you only have to replace a bad coil, not all of them. Probably 90% of the reported bad coil problems are not actually the coil but a bad boot. These coils got a bad rap for going bad due to the boots going bad with age but they are pretty reliable.
Senior User
Joined: Feb 2010
Posts: 226
Likes: 1
From: TX
COPs
Whoever told you to change ALL of the cops...tell this person to
take a hike please.
You change one as needed.
The most likely problem you are having, is that you are buying
cheap auto parts store cops.
If you go find you a good deal on some Motorcraft cops at Ford,
You would have much better luck.
I really dont think that its in the wiring.
I also dont think that its the plug.
Just by chance, is the boot kinda burned looking on that cop???
Do you hear any ticking sounds in that general area of the cop???
If it is, then you have a plug that is loose, hot combustion gases
are blowing on the cop overheating it.
Eventually the plug will blow out completely, sound like a gun shot
and destroy the cop and plug too.
This is usually what happens on the Ford modular engines.
take a hike please.
You change one as needed.
The most likely problem you are having, is that you are buying
cheap auto parts store cops.
If you go find you a good deal on some Motorcraft cops at Ford,
You would have much better luck.
I really dont think that its in the wiring.
I also dont think that its the plug.
Just by chance, is the boot kinda burned looking on that cop???
Do you hear any ticking sounds in that general area of the cop???
If it is, then you have a plug that is loose, hot combustion gases
are blowing on the cop overheating it.
Eventually the plug will blow out completely, sound like a gun shot
and destroy the cop and plug too.
This is usually what happens on the Ford modular engines.
New User
Joined: Feb 2010
Posts: 7
Likes: 0
No, the boot dosent look any diferent than when I put them in, I havent eard any noises from that area at all, the only noise I hear is after I shut the engine off is normal cooling down noises. Now Im noticing that at initial start up the engine bogs down and sputters for a bit but after about 5 minutes runs normal.
Thanks
Thanks
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
I agree, never change all the cops. I wish I had all the good cops everybody threw out, I would be rich.
Also; keep your ears open for ticking noises and act fast (plugs). Don't discount it as an exhaust leak.
Also; keep your ears open for ticking noises and act fast (plugs). Don't discount it as an exhaust leak.
Thread
Thread Starter
Forum
Replies
Last Post
JWA
1968-Present E-Series Van/Cutaway/Chassis
3
Jul 25, 2013 06:10 AM
