7.3 powerstroke glow plugs - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-06-2014, 07:13 PM
Member
 

Join Date: Dec 2013
Posts: 47
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
7.3 powerstroke glow plugs

What would cause the glow plugs not to charge?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 01-07-2014, 03:22 AM
Powerstroke.org Fanatic
 

Join Date: Dec 2011
Location: Bentonville, AR
Posts: 101
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
First place to look is the glow plug relay. On my 1995 PSD, its mounted to the left (looking from the front of the truck) of the fuel filter canister, under the cover. Best to check it with a meter..... on the big posts, a wire comes from the starter relay on the passenger-side fender and will have 12V on it all the time. The other large post (big but smaller wires feed the glow plugs) will have 12V only when the relay is "picked". That reading should be very close to the one you get on the other post.

The smaller posts are the "pick" circuit. With a meter, you should see 12V when the key is first turned on, and for up to maybe 2 minutes. You can be pretty sure the relay is energizing if you watch the ammeter on the dash when you turn on the key..... "Wait To Start" light comes on.... should see a noticable drop on the gauge when the relay is energized. DOES NOT mean that the 12V is making it thru the relay on the big posts, though. That's why I suggest you use a meter.

Be sure to search this part of the forum.... you'll find some good posts about glow plug issues.

Be aware that a good, lower-cost, heavy-duty relay can be bought... Western Plow # 56131K...... I got mine from Russo Power for $14.99 + shippping... totaled $30-something for 2 of them ( this link will say something like "deprecated browser error" for some reason.... but it goes to Russo's site) Deprecated Browser Error

Last edited by nra1ifer; 01-07-2014 at 03:27 AM.
Reply With Quote Quick reply to this message
  #3  
Old 01-07-2014, 03:52 AM
Compression Ignition Addict
 

Join Date: Aug 2008
Location: Madison, WI
Posts: 2,900
Thanks: 2
Thanked 58 Times in 56 Posts
Feedback Score: 0 reviews
The small terminals are the COIL circuit, the large terminals are the CONTACT circuit. The contact circuit voltage will be less than 12V when the relay is energized, because of the load of the GPs (when they're working). The key is the DIFFERENCE between the two (voltage drop) measure the voltage at BOTH large terminals right after turning the key to RUN. The terminal going to the GPs will read slightly lower, but the difference should be no more than 0.3V. If it's more, then the relay is failing, even though it's technically making contact.

Before going too far, though, are you getting a WTS light? Is the truck otherwise starting, with extended cranking?
Reply With Quote Quick reply to this message
  #4  
Old 01-07-2014, 06:32 AM
Member
 

Join Date: Dec 2013
Posts: 47
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
I have a wait to start light and the realay is getting power but under exesive cracking it still won't start
Reply With Quote Quick reply to this message
  #5  
Old 01-07-2014, 07:18 AM
Chapter Director

 

Join Date: Aug 2012
Location: Davenport, IA
Posts: 2,777
Thanks: 2
Thanked 29 Times in 24 Posts
Feedback Score: 5 reviews
Quote:
Originally Posted by ztank View Post
I have a wait to start light and the realay is getting power but under exesive cracking it still won't start
Check this out and read through all of it Diagnosing a 7.3 no start
Reply With Quote Quick reply to this message
  #6  
Old 01-07-2014, 08:33 AM
Member
 

Join Date: Dec 2013
Posts: 47
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
The link doesn't work
Reply With Quote Quick reply to this message
  #7  
Old 01-07-2014, 08:41 AM
Chapter Director

 

Join Date: Aug 2012
Location: Davenport, IA
Posts: 2,777
Thanks: 2
Thanked 29 Times in 24 Posts
Feedback Score: 5 reviews
Quote:
Originally Posted by ztank View Post
The link doesn't work
Works for me search "diagnosing 7.3 no start" and you should find it
Reply With Quote Quick reply to this message
  #8  
Old 01-07-2014, 05:06 PM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 1,665
Thanks: 0
Thanked 29 Times in 29 Posts
Feedback Score: 0 reviews
Link worked for me too. Cheers!
Reply With Quote Quick reply to this message
  #9  
Old 01-07-2014, 05:35 PM
Member
 

Join Date: Dec 2013
Posts: 47
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
When I click the link it takes me here
Attached Thumbnails
7.3 powerstroke glow plugs-1389148495309.jpg  
Reply With Quote Quick reply to this message
  #10  
Old 01-07-2014, 06:30 PM
Compression Ignition Addict
 

Join Date: Aug 2008
Location: Madison, WI
Posts: 2,900
Thanks: 2
Thanked 58 Times in 56 Posts
Feedback Score: 0 reviews
Link worked for me...
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user 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.



Thread Tools
Display Modes

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



All times are GMT -8. The time now is 11:14 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors