Go Back   Ford Truck Enthusiasts Forums > Misc. > Electrical Systems/Wiring
Sign in using an external account
Register Forgot Password?


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 12-28-2011, 09:29 AM
DaGuru373 DaGuru373 is offline
New User
 
Join Date: Sep 2010
Location: Brunswick, Ohio
Posts: 5
DaGuru373 is starting off with a positive reputation.
Question 5.4L coil pack (coil over plug)

Hello club FTE. members.............
Im currently replacing my plugs boots springs and Ect.
What I want to know is if there is a specific resistance (Ohms) rating or a range that a good or acceptable coil should be at ?
I have checked 4 of the 8 at room temp. and all read 7 Ohms but does ANYBODY know specificly the acceptable number ?
Thank you..................Jc.
Thats checking from pin to pin on the connector btw...
Reply With Quote
  #2  
Old 12-28-2011, 11:57 AM
JWA's Avatar
JWA JWA is offline
Post Fiend
 
Join Date: Aug 2010
Location: Reynoldsburg, Ohio
Posts: 7,003
JWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputationJWA has a superb reputation
Typically and in my experience with a known bad COP checking DC resistance isn't a reliable indication of anything. I've had known bad COP's check out just fine with a DVM.

The best way to test is either in operation---you'll notice a misfire or using sophisticated electronic diagnostic tools. While the vehicle is running carefully disconnect each COP from the wire harness to see if a noticeable change happens---if not the COP is good.

HTH
Reply With Quote
  #3  
Old 12-28-2011, 03:51 PM
Franklin2's Avatar
Franklin2 Franklin2 is offline
Moderator
 
Join Date: Jan 2001
Location: Staunton VA
Posts: 33,275
Franklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant future
The newer engine computers that drive these cop systems are usually smart enough to detect a cylinder miss-fire, and will tell you which cylinder it is. It's true, a regular volt-ohmmeter doesn't have a high enough voltage to fully test the insulation integrity of the coils.
__________________
Dave F

1989 F250 XLT Diesel
Reply With Quote
Old 12-28-2011, 03:51 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
5.4L coil pack DaGuru373 Expedition & Navigator 3 12-28-2011 10:21 PM
2001 F150 P0303 Code hava50f1 1997 - 2003 F150 1 03-07-2010 09:34 PM
Engine Hesitates or Stumbles During Acceleration PersiusOne 1997 - 2003 F150 4 11-24-2008 08:19 PM
Ignition coil resistance ? ericsmith32 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks 1 12-07-2006 08:24 PM
2000 4.2 coil pack check WVF150VIANC 3.8 & 4.2L V6 21 07-29-2004 09:11 AM


Go Back   Ford Truck Enthusiasts Forums > Misc. > Electrical Systems/Wiring

Tags
2008, 250, 54, advice, coil, cop, f150, f250, ford, forum, pack, packs, plug, problems, truck

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


Participate In The Forums

Create new posts and participate in discussions. It's free!

Sign Up »





All times are GMT -5. The time now is 12:26 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
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. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup