charging question - 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 08-25-2013, 02:13 PM
Member
 

Join Date: Jul 2007
Location: Clarion, PA
Posts: 64
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
charging question

I had a problem starting my truck a few days ago. It started right up after sitting for a few days. Then I drove it 1 mile up the road to get some milk. I got back in the truck and it did the click thing the first time I tried to turn it over. The second time I nursed to start. It was a slow start. I narrowed it down to a loose negative battery terminal. I cleaned and tightened it up and checked everything with my multimeter. Sitting it holds 12.65 volts. After the glowplugs go it gets drawn down to 11.6, during starting it goes down to 10.45 volts. At an idle it only makes 11.84 volts. I rev it up and the alternator doesnt' excite till almost 2000rpm. Then only goes up to 13.75 volts. My uncle told me 20 years ago the magic voltage in automobiles is 14.6 and that you need to be as close to that as possible without going over. Are these voltages normal? And does it take that engine speed to excite the alternator?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 08-31-2013, 05:58 AM
Member
 

Join Date: Jul 2007
Location: Clarion, PA
Posts: 64
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
No one has any insight?
Reply With Quote Quick reply to this message
  #3  
Old 08-31-2013, 02:46 PM
Compression Ignition Addict
 

Join Date: Jun 2010
Location: Douglassville, PA
Posts: 1,030
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Sounds like its time to replace the batteries, but load testing can confirm that.
It also sounds as though your alternator is on its way out. I highly recommend an upgrade at this point, like to a DC engineering 185oem. I made the upgrade and you can tell the difference in how the truck runs. It boils down, the oem unit is severely undersized, and the FICM suffers from it.
Reply With Quote Quick reply to this message
  #4  
Old 09-01-2013, 06:11 AM
Powerstroke Techie

 

Join Date: Nov 2010
Location: South Fayette/Pittsburgh PA
Posts: 5,097
Thanks: 17
Thanked 64 Times in 58 Posts
Feedback Score: 3 reviews
typically a 6.0 will sit and idle around 13.7-14.0v after about 30 seconds when the alt kicks on.
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 06:06 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