Test glow plugs at harness? - Ford Powerstroke Diesel Forum

6.0L Problems Forum Having Trouble? Post here

 
LinkBack Thread Tools Display Modes
post #1 of 4 Old 08-31-2013, 03:41 AM Thread Starter
Member
 
Join Date: Jan 2011
Posts: 85
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Test glow plugs at harness?

I'm chasing down a cold start issue and was thinking that, assuming the harnesses are good, you should be able to test the plugs individually from the GPCM side of the harness to the block. Thoughts?

2005 Excursion Limited 6.0L 2wd
Atlas 40, Bulletproof EGR cooler, coolant filter, 6.4L banjos, Cat coolant, Gogo direct solenoid, 7.3 fan clutch. Otherwise, all stock.
bigric is offline  
post #2 of 4 Old 08-31-2013, 01:13 PM
Powerstroke Techie

 
Join Date: Nov 2010
Location: South Fayette/Pittsburgh PA
Posts: 5,825
Thanks: 33
Thanked 143 Times in 129 Posts
Mentioned: 0 Post(s)
Quoted: 13 Post(s)
Garage
Feedback Score: 4 reviews
yes you can. I find it easier to resistance test the plugs where the glow plug harness connects into the main engine harness. Good glow plug resistance is low, 1-2 ohms typically

BUT if you're not throwing any glow plug DTCs then you probably are not going to find anything by testing resistance. You would need to test the draw of a bank of glowplugs with an inductive ammeter to really know anything.

I will say that usually cold start problems are due to a failing FICM or sludged up injectors.

-Matt

Ford Senior Master Tech

2015 F-250 XLT 6.7L

2006 F-250 6.0L SOLD
sinner6.0L is offline  
post #3 of 4 Old 08-31-2013, 07:34 PM Thread Starter
Member
 
Join Date: Jan 2011
Posts: 85
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Thanks; I needed an excuse to upgrade my DVM anyway.

As a little background, I've got a recent ficmrepair unit, solid hpo, and good batteries. I'd been tracking hpo and FICM voltage during cold cranking but noticed for the first time this morning that cranking speed was ~110 rpm during several failed attempts. My starter went out this afternoon (although in a different failure mode), so it'll be interesting to see how it behaves now. The new starter is already much more quiet...

2005 Excursion Limited 6.0L 2wd
Atlas 40, Bulletproof EGR cooler, coolant filter, 6.4L banjos, Cat coolant, Gogo direct solenoid, 7.3 fan clutch. Otherwise, all stock.
bigric is offline  
post #4 of 4 Old 09-01-2013, 05:52 AM
Powerstroke Techie

 
Join Date: Nov 2010
Location: South Fayette/Pittsburgh PA
Posts: 5,825
Thanks: 33
Thanked 143 Times in 129 Posts
Mentioned: 0 Post(s)
Quoted: 13 Post(s)
Garage
Feedback Score: 4 reviews
yeah good cranking speed varies but is definitely more than that. I've seen some trucks with all conditions right have cranking speed near 200 RPM.

-Matt

Ford Senior Master Tech

2015 F-250 XLT 6.7L

2006 F-250 6.0L SOLD
sinner6.0L is offline  
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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome