Damn V-10's
Bleed Ford Blue
Joined: Apr 2009
Posts: 13,578
Likes: 157
From: Anchorage Alaska
mine never once sent a CEL, except after i started unplugging COPs well it was running. otherwise it was a minor enough. miss that did not trip the computer..but made driveablity horrible!
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
A miss caused by a bad boot won't show up anywhere either.
Senior User
Joined: Dec 2004
Posts: 451
Likes: 0
From: sw mich
Did you ever go back and change #4 & #5? That would be the first thing I would do. It's not as scary as it looks once you get into it. I think I just used a 6" extension to brake the plug loose, removed the wrench and turned it the rest of the way by hand. A magnetic screwdriver for the COPS retaining screw would be helpful to get that started back in.
After spilling coolant in mine a few weeks ago, it ran real bad for a few days until it all evaporated. It never did throw a code.
After spilling coolant in mine a few weeks ago, it ran real bad for a few days until it all evaporated. It never did throw a code.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
Wow , which ad was it. I would have sent them all back for a refund after the second one or take up a case.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
Did you ever go back and change #4 & #5? That would be the first thing I would do. It's not as scary as it looks once you get into it. I think I just used a 6" extension to brake the plug loose, removed the wrench and turned it the rest of the way by hand. A magnetic screwdriver for the COPS retaining screw would be helpful to get that started back in.
After spilling coolant in mine a few weeks ago, it ran real bad for a few days until it all evaporated. It never did throw a code.
After spilling coolant in mine a few weeks ago, it ran real bad for a few days until it all evaporated. It never did throw a code.
Posting Guru
Joined: Sep 2008
Posts: 2,498
Likes: 2
Mine developed a come and go skip last year and I replaced the plugs and boots, this cured the problem.
I have heard the mass air-flow can also cause the problem you are have although it will usuually throw a code.
Also low fuel pressure could cause this problem. Check fuel pressure.
But most likely it the coils on top of the plugs as everyone as suggested. One bad cop will make an engine run rough.
Also I might add there's a lot of code scanners out there some good and some not so good.
I have heard the mass air-flow can also cause the problem you are have although it will usuually throw a code.
Also low fuel pressure could cause this problem. Check fuel pressure.
But most likely it the coils on top of the plugs as everyone as suggested. One bad cop will make an engine run rough.
Also I might add there's a lot of code scanners out there some good and some not so good.
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Posting Guru
Joined: Sep 2008
Posts: 2,498
Likes: 2
I think a lot of these bad COPS only need a new boot. I no longer consider a boot good when I change plugs. I don't change spark plugs, I change spark plugs and boots at the same time. Most all boots that have been in a motor for over 30,000 miles will have small cracks in them. It is very easy to check them just squeeze the bottom of the boot together with two fingers and the cracks will show. These boots just get baked in the heads of these engines. Its easy to blame it on the plugs but if the boot is arcing fire of course the plug will look bad.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
You were smart to change the boots because they develop cracks you might not see. I don't think greasing the boots would be smart though, all it does is attract moisture, dirt, and rots the rubber. All you need it a tiny bit on the tip of the spring to prevent corrosion. I put heavy grease around the top of mine to seal them but I will change them before the rubber softens too much. Anything below that area should be dry.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
I think a lot of these bad COPS only need a new boot. I no longer consider a boot good when I change plugs. I don't change spark plugs, I change spark plugs and boots at the same time. Most all boots that have been in a motor for over 30,000 miles will have small cracks in them. It is very easy to check them just squeeze the bottom of the boot together with two fingers and the cracks will show. These boots just get baked in the heads of these engines. Its easy to blame it on the plugs but if the boot is arcing fire of course the plug will look bad.
Change plugs-change boots.
New User
Joined: May 2012
Posts: 22
Likes: 0
hindsight is always 20/20