Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 06-16-2011, 07:16 PM
redbull713's Avatar
redbull713 redbull713 is offline
Officially Welcomed to the 'Fest
Location: USA!
 
Join Date: Mar 2011
Posts: 294
Mein Auto: '97 540i/6
How to test ignition coils? E39 540i M62

I would like to know what the procedure for testing an ignition coil is. What kind of multimeter is good for this?
Thanks
Reply With Quote
Ads by Google
  #2  
Old 06-16-2011, 09:30 PM
JimLev JimLev is offline
Officially Welcomed to the 'Fest
Location: MA
 
Join Date: Dec 2003
Posts: 3,610
Mein Auto: 540/6, S60 Volvo, Tribeca
About all you can do is check it with an ohm meter. The spec is in Bentleys, I'm traveling and don't have them with me.
It your a McGiver type you could hook a pulsed voltage up to the input and measure the output on a scope using a large resistor divider network.
The output is probably around 50,000 volts so get your worse neighbor to hold it.
Reply With Quote
  #3  
Old 06-16-2011, 09:34 PM
redbull713's Avatar
redbull713 redbull713 is offline
Officially Welcomed to the 'Fest
Location: USA!
 
Join Date: Mar 2011
Posts: 294
Mein Auto: '97 540i/6
Quote:
Originally Posted by JimLev View Post
About all you can do is check it with an ohm meter. The spec is in Bentleys, I'm traveling and don't have them with me.
It your a McGiver type you could hook a pulsed voltage up to the input and measure the output on a scope using a large resistor divider network.
The output is probably around 50,000 volts so get your worse neighbor to hold it.
DAING! Oh well, so i just check the resistance?
Reply With Quote
  #4  
Old 06-16-2011, 10:13 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 20,127
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by redbull713 View Post
DAING! Oh well, so i just check the resistance?
I remember seeing it in my Bentleys also.

But most people test 'em on the vehicle.

- How to check which coil is bad:
Reply With Quote
  #5  
Old 06-16-2011, 10:18 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 20,127
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by JimLev View Post
The spec is in Bentleys
I just checked. The Bentleys (which every BMW owner should have) show how to test 'em on page 120-11 "Ignition System" among other pages.
Reply With Quote
  #6  
Old 06-17-2011, 06:42 AM
bimmerteck bimmerteck is offline
BMW Magician
Location: Nashville, TN
 
Join Date: May 2011
Posts: 373
Mein Auto: e30 M50ish
Low Current Probe around the ground supply to the coil is How I test them with the labscope.

http://www.amazon.com/Electronic-Spe...317508&sr=1-12


Hickok also makes a handheld COP tester that some of the techs that weren't quite as tech savvy used to quickly identify "the bad one" I never used it but they seemed to have very good results. It's fast b/c it doesn't require any dis-assembly other than pulling the coil covers.

http://www.amazon.com/Hickok-76562-C...ref=pd_cp_hi_3


They will often fail and still pass the resistance test so I don't even bother with it.
Reply With Quote
  #7  
Old 06-17-2011, 06:53 AM
bmw_n00b13's Avatar
bmw_n00b13 bmw_n00b13 is offline
Freude am Fahren
Location: Cambridge, ON
 
Join Date: Feb 2008
Posts: 6,372
Mein Auto: 99 528iA
Or you can move it from cylinder to cylinder if you're getting a misfire.. See if it follows.
__________________
'99 528i ('98/12 build). 174,000km BY29428/Royalrot
Breaking My Wallet since 2009
Mods: Stoptech SS brake hose, 280piece toolkit resting on trunk floor, Beisan VANOS seals
'99 540i (grandfather's)

Reply With Quote
  #8  
Old 06-25-2012, 12:40 PM
jmansour jmansour is offline
Officially Welcomed to the 'Fest
Location: Kennesaw, GA
 
Join Date: Sep 2011
Posts: 241
Mein Auto: 04 325i -5spd black/black
hey guys I know this is a old thread but im havng a missfire in cyl 2. i tested the coils the hard way () they all work.

the Spark plugs are new. Any more ideas?

2000 540i with 107k miles :/
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)
Today's Posts Search
Thread Tools
Display Modes

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



Forum Jump


All times are GMT -7. The time now is 11:35 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms