still sputtering and missing???
Thread Starter
|
Senior User
Joined: Jun 2007
Posts: 130
Likes: 0
From: Mesa Az
still sputtering and missing???
My 2000 V10 Excursion with 150k miles has been running rough on idle and under acceleration occasionally and it is getting worse. I cleaned the MAF sensor, and replaced the fuel filter, and it did not help. So I bought a new set of COP`s off ebay and replaced all 10 with the new COP`s and new plugs. It is getting worse and no check engine light has come on. Anyone have any idea what could be the problem?
Thread Starter
|
Senior User
Joined: Jun 2007
Posts: 130
Likes: 0
From: Mesa Az
It started out running rough when cold and then cleared up like you said, but now it runs rough at start up and all the time...sounds like its not firing on all 10. I don`t know if the fuel pressure in the rails is good...any idea how can I test for that?
Cargo Master
Joined: Jul 2009
Posts: 2,885
Likes: 26
From: Chino, California
typically, if it's rough when cold, but clears up when warm, it's the IAC valve.
When you changed your COPs, did you replace the boots as well? Sometimes old boots could have cracks that can cause a short if water gets into the spark plug hole.
There is a Schraeder (spelling) valve on the rail on the passenger side. You can hook up a gauge to that. Someone can chime in on what pressure you should have.
When you changed your COPs, did you replace the boots as well? Sometimes old boots could have cracks that can cause a short if water gets into the spark plug hole.
There is a Schraeder (spelling) valve on the rail on the passenger side. You can hook up a gauge to that. Someone can chime in on what pressure you should have.
Thread Starter
|
Senior User
Joined: Jun 2007
Posts: 130
Likes: 0
From: Mesa Az
I also pulled and cleaned the IAC before doing the plugs and COP`s...there was not much carbon build up on it. It ran the same after I cleaned it.
Trending Topics
Cargo Master
Joined: Jul 2009
Posts: 2,885
Likes: 26
From: Chino, California
Maybe the motor is out?
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: Jun 2007
Posts: 130
Likes: 0
From: Mesa Az
The new COP`s that I installed came with new boots and there was no moisture. I will hook up a gauge tomorrow when I get home from work and let you guys know what pressure it has. Thanks for the help!
Thread
Thread Starter
Forum
Replies
Last Post
RRRAVEN
Modular V10 (6.8l)
11
Aug 14, 2013 11:47 AM
Liale
Modular V10 (6.8l)
34
Jun 26, 2010 03:04 PM
