ignition coil - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-03-2007, 08:28 PM
Registered User
 
Join Date: Feb 2007
Location: fl.
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
ignition coil

is it possible to test an ignition coil after it has been taking out ?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-03-2007, 08:58 PM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Last photo:
Join Date: Aug 2005
Location: Prattsville
Posts: 6,349
Wiki Edits: 31

Thanks: 2
Thanked 53 Times in 49 Posts
yep, ohm it out first, verify it's within spec, if you want, apply 12v & ground to it, hook a volt meter up to the tower, ground to body, switch on 12v then turn it off, the magnetic field will collapse into the secondary windings, inducing voltage into the secondary windings, making voltage.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-04-2007, 12:06 AM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Doc here,

To test the coil, you can OHM it out.

Set your DVOM to R X 1 , Ohms, calibrated 000, and first measure the primary side. It should read less than an OHM, but more than 000. More or less than that, toss it , it's bad.

Next, measure the secondary side, Set your DVOM scale to R X 10 K or higher, your readings should be between 10,000 and 11,000. Outside of that range, toss it, it's bad.



For a GM HEI in cap type coil, the proceedure is the same, BUT the Numbers for secondary are 6,000 to 30,000 Ohms.

This test will show functionality of the coil, but will not show Internal Arc~over due to winding insulating paint or Thermal malfunction. You need an Oscilloscope and a test jig, or running vehicle to determine that.

To "Spark" test it, get a 12 volt source, hook 12 VDC to the + side of the coil, Ground the coil to a bench vise, as well as your 12 volt source.

Install a plug wire in the Coil tower, and an old spark plug, and tighten it down in the bench vise where you can monitor the gap.

Hook a wire from to the - side of the coil and quickly touch it to the vise. The plug Should fire a nice BLUE spark each time you do this.

If it does not, OR the fire is anemic yellow or white, the coil is bad.

You will not be able to do this with a GM HEI in cap coil though.

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ignition system info................ poncho62 Electrical 18 10-11-2008 10:10 PM
How Does This Stuff Work? docvette Electrical 3 06-18-2006 03:00 AM
Help me pick- Electronic Ignition Coil Francis Electrical 27 04-24-2006 05:11 AM
Ignition Coil resistance Question Old School Nut Engine 3 06-11-2005 03:36 PM
capicator for coil?? points ignition HELP jadye Electrical 2 04-30-2004 10:17 AM


All times are GMT -6. The time now is 04:51 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.