Injector Replacement Intervals - 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 08-25-2010, 04:36 PM
Powerstroke.org Rookie
 

Join Date: Dec 2005
Posts: 18
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Injector Replacement Intervals

Hello, I would like your opinions on when to change injectors in a 7.3 motor ? Do you usually change them after so many miles, or wait until they go bad ? How can you tell if you have one or more bad ? Is there a diagonistic test that I can have a shop do to test injectors ? My 1999 F-350 seems to run fine to me, but I've got 260,000 miles on it, and was wondering if i need to replace the injectors ? They are so expensive I hate to change them if it's not needed. Also, if I do need to start looking for injectors, where is the best place to get them ? Thanks for your help.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 08-25-2010, 08:11 PM
Member
 

Join Date: May 2009
Posts: 68
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
You can check resistance on your glow plugs and injectors at the rectangular valve cover harness. Marty did a write up on the glow plugs, and DND58 filled me in on the readings for the injectors...here you go:

5a) Voltmeter method - Remove the large rectangular plug leading to the valve covers on either side of the engine. This plug powers your glow plugs and injectors. The 2 outside pins are your glow plugs, the 4 inner ones are for the injectors. () () () () () () () () () Blue is the Glow Plugs Red is the injectors, Black is the common for the injectors. Be very careful not to insert your test lead into one of the injector pins. The IDM feeds the injectors 110V and could cause a lot of sparks if it happens to try and actuate the injectors while you're testing, and could worse destroy the IDM, so steer clear of those and make sure you test only the 2 outer pins on each side of the plug.
Connect the ground lead of your voltmeter to a good ground, and insert the positive + test lead into the first glow plug pin.
A good glow plug will read btwn 0.8 - 1.2 ohms a weak glow plug will have much less resistance, and a completely dead one will have unlimited resistance through it because the electrode is internally burned out. Make note of the plugs that are out of range based on the cylinder number, and replace them. The cylinders are numbered 1-3-5-7 on the pass side, front to back, and 2-4-6-8 on the driver's side, front to back.

__________________________________________________ _______________________

Injectors:
Test on the pins going into the valve cover to read resistance from the glow plugs and injectors.

G G I I C I I G G

Test between "I" and "C" to test the injectors, should be less than 5.0 Ohms.
Test between "G" and battery ground to test glow plugs. Should be between 0.6 and 2.0 Ohms
__________________________________________________ ____________________

you can use something like this:
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:
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 03:01 AM.


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