need help tracking down bad cop
Thread Starter
|
Senior User
Joined: Mar 2013
Posts: 204
Likes: 0
From: Ocala FL
need help tracking down bad cop
Hey guys. Drove up to TN from FL last night. Truck ran great until I stopped in Chattanooga. After I started it back up I could tell it was missing slightly. Accelerated back onto the interstate and it was missing somewhat- mostly below 2500 rpm. If I dropped it down a lower gear it would clear up. I was trying to make it miss enough to set off a CEL but it wouldn't do it. Started it up today and now it runs fine again. I'd like to try and track down which cylinder it is before I drive back to FL. Any other way to track down which cylinder it is? I brought some tools and spare COP's with me lol. Have my scanner also- shows no pending or current codes. Cylinder 3 COP went bad a few weeks ago. Replaced it and was running perfect until last night. Thanks for the help.
Senior User
Joined: Aug 2005
Posts: 117
Likes: 0
Just some info. I was recently told by two good mechanics COPS do not go bad . The plug wire or boots go bad and cause the misfires or engine miss. I have not tried it yet but I will the next time there is an issue.
Hotshot
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
Your two mechanics are wrong. The boots and plugs can do it, but it's often more than that. There are no plug wires.
Trending Topics
Fleet Owner
Joined: Apr 2008
Posts: 24,322
Likes: 5,132
From: 0,0,1
For example: Just recently I fixed my alternator for $13.99 while a rebuilt goes for $250. I took it apart and found the brushes were almost gone. I ended up buying a regulator with the brushes already attached on eBay. I installed them this past weekend and all is well.
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
Thread Starter
|
Senior User
Joined: Mar 2013
Posts: 204
Likes: 0
From: Ocala FL
I replaced the plugs about 5000 miles ago. Also replaced 3 of the boots that looked like they weren't in the best shape. All others looked great. Still no misfires again lol. Maybe it was just getting used to the cold weather 
. Probably the coldest it's ever seen. Was 23* this morning and supposed to be down in the teens the next few days.
. Probably the coldest it's ever seen. Was 23* this morning and supposed to be down in the teens the next few days.
Fleet Owner
Joined: Apr 2008
Posts: 24,322
Likes: 5,132
From: 0,0,1
Thread Starter
|
Senior User
Joined: Mar 2013
Posts: 204
Likes: 0
From: Ocala FL
No no! I'm in Tennessee right now. Kind of looking forward to going back to the warm! Supposed to get some snow tomorrow though. First time the kids will have ever seen snow 
Thread
Thread Starter
Forum
Replies
Last Post
capesteve
1997 - 2006 Expedition & Navigator
21
Feb 10, 2017 07:08 AM