miss without setting code?
Thread Starter
|
Senior User
Joined: May 2006
Posts: 317
Likes: 0
From: Versailles, KY
miss without setting code?
I'm at the shop right now. Engine misses like the chronic COP issue I've had many times. Mechanic claims no codes, pending or otherwise. I have a 5 star tune on it. Can this affect the code reading?
I'm on vacation and don't want to get ripped off.
I'm on vacation and don't want to get ripped off.
TreadLightly
Joined: Oct 2006
Posts: 1,608
Likes: 0
From: SE Missouri
The tunes should not "block" codes from registering. There are lots of threads about COP's going bad without setting codes even without tunes.
Keep in mind that it could be an injector, spark plug or just a boot.
Thread Starter
|
Senior User
Joined: May 2006
Posts: 317
Likes: 0
From: Versailles, KY
I replaced all my COP's as preventive maintenance last year. New fuel pump last week. I don't want to throw parts at it without knowing what it is, or at least what cylinder is involved. I guess it will set a code eventually. I may have it scanned at the Ford dealer before I leave. Injectors are original with 165,000 miles.
Shop checked it out and couldn't find anything. Good guys; didn't charge me. Midas, Orange City Florida.
Shop checked it out and couldn't find anything. Good guys; didn't charge me. Midas, Orange City Florida.
Elder User
Joined: Apr 2010
Posts: 579
Likes: 0
From: Chiefland, Fl
It could set a "soft" code, I don't think Midas would have the scanner to pick it up. Any shop that has a Snap-on scanner or something similar should be able to detect it. The shop that I use was able to tell me when I had to COP's going out even though the truck had just started acting funny.
TreadLightly
Joined: Oct 2006
Posts: 1,608
Likes: 0
From: SE Missouri
Nice of the Midas guys.
Dealership will charge a 1 hr labor rate. Call ahead to find one that has a decent price. 20 min away I have a stealership that charges $92 an/hr + 3% "shop supplies" (don't need shop supplies on a diagnostic) or I can go 30 min south of me and they only charge $70 an/hr +$2 for "shop supplies".
The other thing you might try is pulling one plug off of each COP "at a time" to see if you can hear the misfire change. This worked for me. The one that doesn't change the idle is your culprit. Then you need to figure out what part. Hope that helps.
Dealership will charge a 1 hr labor rate. Call ahead to find one that has a decent price. 20 min away I have a stealership that charges $92 an/hr + 3% "shop supplies" (don't need shop supplies on a diagnostic) or I can go 30 min south of me and they only charge $70 an/hr +$2 for "shop supplies".
The other thing you might try is pulling one plug off of each COP "at a time" to see if you can hear the misfire change. This worked for me. The one that doesn't change the idle is your culprit. Then you need to figure out what part. Hope that helps.
Thread Starter
|
Senior User
Joined: May 2006
Posts: 317
Likes: 0
From: Versailles, KY
He tried that and couldn't find the problem. He said they had a Snap On $8,000 tool that was 2 or 3 years old. There is a dealer a few miles from the campground I'm going to try before I leave.
TreadLightly
Joined: Oct 2006
Posts: 1,608
Likes: 0
From: SE Missouri
If, by pulling the COP plug, didn't make a difference then that tells me that it is not spark related, right? So then I would lean toward a bad injector, injector plug or injector o-ring. Could it be fuel related, such as your fuel filter?
Trending Topics
Thread Starter
|
Senior User
Joined: May 2006
Posts: 317
Likes: 0
From: Versailles, KY
He checked fuel pressure . Over 40 lbs. A bad injector should set a code too. Of course, it idled perfectly when it was in the shop. It is worse when cold and in the rain. Failed COP symptoms to a T.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
TreadLightly
Joined: Oct 2006
Posts: 1,608
Likes: 0
From: SE Missouri
Sounds logical.
Banned
Joined: Apr 2008
Posts: 139
Likes: 0
From: Shawnee, Kansas
No codes
The V-10 is classified as a 'heavy duty engine' and the parameters for turning on the CEL are much different than a light duty truck or car.
I had a '01 that had a COP wiring issue and it never turned the light on. 125 miles on 9 cyls pulling a 10k fifth wheel.
Someone with more than a scan tool is required. Or just limp it home and tune it up next week...
P.S. I was working on my truck yesterday and noticed the emissions decal says the truck has an OBD II system, old school stuff.
It's amazing that it still runs clean enough to get an "ULEV" sticker (ultra low emissions vehicle)!
I had a '01 that had a COP wiring issue and it never turned the light on. 125 miles on 9 cyls pulling a 10k fifth wheel.
Someone with more than a scan tool is required. Or just limp it home and tune it up next week...
P.S. I was working on my truck yesterday and noticed the emissions decal says the truck has an OBD II system, old school stuff.
It's amazing that it still runs clean enough to get an "ULEV" sticker (ultra low emissions vehicle)!
Last edited by PartsPaul62; Apr 8, 2012 at 08:37 PM. Reason: updated info
Thread
Thread Starter
Forum
Replies
Last Post