Darn COP's
Darn COP's
Post Fiend
Joined: Jun 2003
Posts: 5,643
Likes: 8
From: NE Texas
COPs can be had for about $28.00 each nowadays and that's complete with boots. Still a good chunk of money, but they rarely go out all-at-once.
Noboby can really say when they'll go for sure. Some don't last but for 80K, then others may hang on until 200K. I think alot of it has to do with moisture and trash getting into the plug cavity causing the boot to rot faster, then affecting the COP.
Just get one new COP and find out which cylinder is misfiring by replacing them one at a time until you find it.
Or you could pay the dealer to pull a diagnostic on your engine. Saves time, but could cost from $50.00 to $125.00.
Noboby can really say when they'll go for sure. Some don't last but for 80K, then others may hang on until 200K. I think alot of it has to do with moisture and trash getting into the plug cavity causing the boot to rot faster, then affecting the COP.
Just get one new COP and find out which cylinder is misfiring by replacing them one at a time until you find it.
Or you could pay the dealer to pull a diagnostic on your engine. Saves time, but could cost from $50.00 to $125.00.
Trending Topics
Posting Guru
Joined: Aug 2004
Posts: 2,402
Likes: 0
From: Upstate, NY
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Post Fiend
Joined: Jun 2003
Posts: 5,643
Likes: 8
From: NE Texas
Originally Posted by fivonut
What do you do if a scan comes up empty?
Thing is, a bad COP won't throw a code unless it's a dead miss and has registered for a certain amount of time (engine running time).
Also a COP can spike high and low and never fail completely, making the business of finding the bad one pretty tedious.
That's why, if you have good PR at a dealership, it's easier to get them to pull a diag on it. With me it just costs about $50.00 each time. I have heard other say it cost them $125.00. But the diag can pinpoint the bad COP or COPs with just one check. The tech may need to take it for a road test, but they'll find it.
Lead Driver
Joined: Aug 2004
Posts: 5,326
Likes: 18
From: Gilbert
Big Orn,
Where are you finding those so cheap at? Everywhere I've looked has them at or around $50. The last time I was at the dealership to find a bad cop, they gave me a printout on the receipt of the other 9 coils and 5 of them looked like they were on the verge of death... I imagine replacing all of them would give me (and the truck) a nice fresh start when I change the plugs.
Where are you finding those so cheap at? Everywhere I've looked has them at or around $50. The last time I was at the dealership to find a bad cop, they gave me a printout on the receipt of the other 9 coils and 5 of them looked like they were on the verge of death... I imagine replacing all of them would give me (and the truck) a nice fresh start when I change the plugs.
Post Fiend
Joined: Jun 2003
Posts: 5,643
Likes: 8
From: NE Texas
I'll have to go back and look for that thread, Matt, but almost all of them were online stores. There were a few on Ebay.
There's about 20 different manufacturers with the same part and about that many with similar parts. I guess the automotive parts industry found out real quick how much in demand they were and started gathering them up.
There's about 20 different manufacturers with the same part and about that many with similar parts. I guess the automotive parts industry found out real quick how much in demand they were and started gathering them up.
