At wits end with Misfire P0307 - Ford Truck Enthusiasts Forums



Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator

At wits end with Misfire P0307

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 06-02-2007, 12:08 PM
walterk15 walterk15 is offline
Freshman User
Thread Starter
 
Join Date: Feb 2007
Location: Ft Carson, Colorado
Posts: 49
walterk15 is starting off with a positive reputation.
At wits end with Misfire P0307

I have changed out plugs used both Motocraft and Autolite plugs. Varied the gap on the plugs. Moved COPS around. Yet I still get the same P0307 code.

What could I be missing that would still cause this??

Thank You for any help
Reply With Quote
  #2  
Old 06-02-2007, 12:42 PM
Silver Streak Silver Streak is offline
Postmaster
 
Join Date: May 2002
Location: Broken Arrow, OK
Posts: 3,235
Silver Streak is gaining momentum as a positive member of FTE.
A vacuum leak, a bad injector or low compression.
Reply With Quote
  #3  
Old 06-02-2007, 03:25 PM
walterk15 walterk15 is offline
Freshman User
Thread Starter
 
Join Date: Feb 2007
Location: Ft Carson, Colorado
Posts: 49
walterk15 is starting off with a positive reputation.
Where would I look for a vacuum leak at?? This is only effecting a single cylinder?? I didn't see any vacuum lines coming off the # 7 cylinder.


I was at a stop light when I took off the vehicle started to sputter and the CEL came on.
Reply With Quote
  #4  
Old 06-02-2007, 07:30 PM
COramprat's Avatar
COramprat COramprat is offline
Junior User
 
Join Date: Feb 2004
Location: Louisiana
Posts: 77
COramprat is starting off with a positive reputation.
Do you get another code with the misfire code? Sometimes you get a lean code with the misfire. Try this...

Check your oil. Does it smell like fuel???

What happens a lot on a bad misfire is the unburned fuel makes it's way into the crankcase and these fuel vapors are sucked back into the intake by the PCV system. That causes a rich mixture and more misfires due to the rich mixture caused by the fuel vapors. So change your oil and remove all the plugs and clean them well with brake cleaner if you don't have a spark plug cleaner.

Another reason you could still have a misfire is also related to oil.

Sometimes when you have a misfire the unburned fuel washes the rings down so you will have a temporary drop in compression in that cylinder. To fix this again change the oil and filter and clean the plugs and run it until it goes away. Don't worry if it's reason #2 the compression will return to normal.
Reply With Quote
  #5  
Old 06-02-2007, 10:50 PM
walterk15 walterk15 is offline
Freshman User
Thread Starter
 
Join Date: Feb 2007
Location: Ft Carson, Colorado
Posts: 49
walterk15 is starting off with a positive reputation.
The only other code I get is a P1000.

Now I moved the COP and the injector from cylinder #7 to cylinder position # 5 .

P0307 has gone away. Now I get P0305.

I am going to move the COP that's on cylinder #5 to cylinder #1 and see if I still get the error code (P0301). I'm thinking its the COP for now. I will report back in the morning with the results.
Reply With Quote
  #6  
Old 06-03-2007, 09:02 AM
davisenvy davisenvy is offline
Senior User
 
Join Date: Jan 2005
Location: Franklin, NC
Posts: 196
davisenvy is starting off with a positive reputation.
COP's are a common problem on these trucks. I would put some time into investigating this area.
Reply With Quote
  #7  
Old 06-03-2007, 04:30 PM
walterk15 walterk15 is offline
Freshman User
Thread Starter
 
Join Date: Feb 2007
Location: Ft Carson, Colorado
Posts: 49
walterk15 is starting off with a positive reputation.
After moving the COP from#5 to #1, obtained P0301 code. I have a bad COP.

Emailed Troyer and asked them to send me a new COP. I have only had the new COPs for about 45 days.
Reply With Quote
  #8  
Old 06-03-2007, 06:28 PM
Johnny Langton's Avatar
Johnny Langton Johnny Langton is offline
Postmaster
 
Join Date: Oct 2006
Location: SE Texas
Posts: 4,171
Johnny Langton has a great reputation on FTE.Johnny Langton has a great reputation on FTE.Johnny Langton has a great reputation on FTE.Johnny Langton has a great reputation on FTE.Johnny Langton has a great reputation on FTE.Johnny Langton has a great reputation on FTE.
Quote:
Originally Posted by walterk15
After moving the COP from#5 to #1, obtained P0301 code. I have a bad COP.

Emailed Troyer and asked them to send me a new COP. I have only had the new COPs for about 45 days.
What kind of COP's are they?
JL
Reply With Quote
  #9  
Old 06-03-2007, 06:42 PM
walterk15 walterk15 is offline
Freshman User
Thread Starter
 
Join Date: Feb 2007
Location: Ft Carson, Colorado
Posts: 49
walterk15 is starting off with a positive reputation.
Here is the set of COPs that I bought from Troyer.

http://www.rpmoutlet.com/musv8wgf.htm



The plugs are fine. I'm using IT-16 DENSO IRIDIUM Plugs .
Reply With Quote
  #10  
Old 06-03-2007, 06:49 PM
Johnny Langton's Avatar
Johnny Langton Johnny Langton is offline
Postmaster
 
Join Date: Oct 2006
Location: SE Texas
Posts: 4,171
Johnny Langton has a great reputation on FTE.Johnny Langton has a great reputation on FTE.Johnny Langton has a great reputation on FTE.Johnny Langton has a great reputation on FTE.Johnny Langton has a great reputation on FTE.Johnny Langton has a great reputation on FTE.
Quote:
Originally Posted by walterk15
Here is the set of COPs that I bought from Troyer.

http://www.rpmoutlet.com/musv8wgf.htm



The plugs are fine. I'm using IT-16 DENSO IRIDIUM Plugs .
I'm not suprised that you're already having a failure...aftermarket pieces like this are always trouble and less relable than the OEM parts. Fine for a street/strip car,but not for a daily driven truck.
JL
Reply With Quote
  #11  
Old 06-07-2007, 11:27 AM
FTE Ken's Avatar
FTE Ken FTE Ken is offline
Post Fiend
 
Join Date: Jan 1997
Location: Enjoying the real world.
Posts: 23,169
FTE Ken has a superb reputationFTE Ken has a superb reputationFTE Ken has a superb reputationFTE Ken has a superb reputationFTE Ken has a superb reputationFTE Ken has a superb reputationFTE Ken has a superb reputationFTE Ken has a superb reputationFTE Ken has a superb reputationFTE Ken has a superb reputationFTE Ken has a superb reputation
JL's spot on with that.

Unless you're running an application that needs it, aftermarket "performance" COPs are a waste of money. The factory COPs do just fine. GMS COPs (that's what those "Motoblue" COPs are) while delivering better performance on high-compression applications at high RPMs in my experience have a high failure rate. I carry a spare because of it!

You'll see the subtle difference on a dyno with GMS COPs with a blower (where you normally see a slight amount of flutter it disappears) but not really with stock.
Reply With Quote
  #12  
Old 06-07-2007, 12:34 PM
walterk15 walterk15 is offline
Freshman User
Thread Starter
 
Join Date: Feb 2007
Location: Ft Carson, Colorado
Posts: 49
walterk15 is starting off with a positive reputation.
Well now that I have them. I will have to keep them.

I ordered a couple of new ones as a spare. This time I will send in the warranty card so that I can get them replaced under warranty.

Thanks for all the information.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Help with misfire! VelleLS1 1999 to 2016 Super Duty 10 11-28-2013 07:56 PM
P0307 fault 02KingExcursion 1997 - 2003 F150 5 10-22-2013 09:28 PM
P0307 fault 02KingExcursion 1997 - 2003 F150 1 10-19-2013 10:21 PM
misfire on hard acceleration mick165 2004 - 2008 F150 9 09-12-2013 10:50 PM
03 Expy 5.4 code P0307 RedHorse1 Expedition & Navigator 4 11-09-2010 02:55 PM


Go Back   Ford Truck Enthusiasts Forums >

Tags
2003, 2005, 2006, 46l, 54, code, cop, cops, cylinder, error, f150, ford, gms, injector, misfire, p0307

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -5. The time now is 08:47 AM.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.