Go Back   Ford Truck Enthusiasts Forums > Diesel > 1999 - 2003 7.3L Power Stroke Diesel
Sign in using an external account
Register Forgot Password?


1999 - 2003 7.3L Power Stroke Diesel SPONSORED BY:

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 05-28-2012, 07:07 PM
maevans's Avatar
maevans maevans is offline
Posting Guru
 
Join Date: Sep 2005
Location: Monroe Michigan
Posts: 2,469
maevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud of
Questions about volt readings in hotter weather

I have noticed the hotter the air temperature gets, the Volts drop according to my ArrowForce Scan gauges.fficeffice" />>>

Exp: Air temperature 50 degrees – Driving speed of 70 MPH – volt gauge reads 14.2 volts.>>
Air temperature 92 degrees – Driving speed of 70 MPH – volt gauge reads 13.7 volts.>>
>>

My questions are – Why is there a drop in volts with the rise in air temp ?>>
Is 13.7 volts normal with the temp being 90 degrees?>>
>>

All winter and spring with cooler temps, 14.3 volts have been the norm for my truck.>>
Batteries and alternator are about 6 months old.>>
This may be perfectly normal, but driving with the gauge displaying Volts, I have notice some change in the reading and would like to know why. Thank for any help.>>
__________________
Mark
.


We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works.
Reply With Quote
  #2  
Old 05-28-2012, 07:40 PM
landmobile's Avatar
landmobile landmobile is offline
Senior User
 
Join Date: Mar 2012
Location: Jenkintown, PA
Posts: 465
landmobile has a good reputation on FTE.landmobile has a good reputation on FTE.landmobile has a good reputation on FTE.
Are you running any additional accessories (such as A/C) during the hot weather?
__________________
Chris Bors
Land Mobile Corporation
99 F350 XLT 4X4 DRW, Knapheide 6132 P-50 Service Body
Reply With Quote
  #3  
Old 05-28-2012, 07:47 PM
maevans's Avatar
maevans maevans is offline
Posting Guru
 
Join Date: Sep 2005
Location: Monroe Michigan
Posts: 2,469
maevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud of
Yes....A/C.....But I have tried turning it off for awhile with out any change in the Volts.
__________________
Mark
.


We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works.
Reply With Quote
  #4  
Old 05-28-2012, 07:53 PM
RV_Tech's Avatar
RV_Tech RV_Tech is offline
Postmaster
 
Join Date: Jan 2010
Posts: 3,795
RV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant future
Quote:
Originally Posted by maevans View Post
Yes....A/C.....But I have tried turning it off for awhile with out any change in the Volts.
Sounds to me like the alternator charges based on temperature compensation. Common in RVs to increase battery longevity. I didn't know Ford did it in their trucks, but since there are many functions that change based on temperature, there is no reason not too.

Here is a link http://www.tekrispower.com/pdfs/xant...20Charging.pdf

Steve
__________________
RVDA/RVIA Master Certified RV Technician
You think you're confused?
2002 F350 Dually, Rhino Liner, Edge Evolution (running in stock mode), 4" exhaust, 6.0 cooler
2010 F150 super cab, box stock, bed slide, ARE bed cover
Reply With Quote
  #5  
Old 05-28-2012, 08:25 PM
F350-6's Avatar
F350-6 F350-6 is offline
Post Fiend
 
Join Date: Mar 2007
Location: Texas
Posts: 23,932
F350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputationF350-6 has a superb reputation
I'll have to pay more attention, but I'm pretty sure mine has been reading over 14 volts above 90 deg. outside temps.
__________________
Chris
2002 F350 6-speed 444 CID. XLT, Heated Seat, 485,000 & counting.
RHN Mods & Maintenance

“Good judgment comes from experience, and a lot of that comes from bad judgment.” Will Rogers
Reply With Quote
  #6  
Old 05-28-2012, 08:27 PM
RV_Tech's Avatar
RV_Tech RV_Tech is offline
Postmaster
 
Join Date: Jan 2010
Posts: 3,795
RV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant future
Quote:
Originally Posted by F350-6 View Post
I'll have to pay more attention, but I'm pretty sure mine has been reading over 14 volts above 90 deg. outside temps.
I'll watch mine also. I never heard of temperature compensation in alternator applications, but it would be kind of cool if it did.

Steve
__________________
RVDA/RVIA Master Certified RV Technician
You think you're confused?
2002 F350 Dually, Rhino Liner, Edge Evolution (running in stock mode), 4" exhaust, 6.0 cooler
2010 F150 super cab, box stock, bed slide, ARE bed cover
Reply With Quote
  #7  
Old 05-29-2012, 06:14 AM
maevans's Avatar
maevans maevans is offline
Posting Guru
 
Join Date: Sep 2005
Location: Monroe Michigan
Posts: 2,469
maevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud of
Quote:
Originally Posted by RV_Tech View Post
Sounds to me like the alternator charges based on temperature compensation. Common in RVs to increase battery longevity. I didn't know Ford did it in their trucks, but since there are many functions that change based on temperature, there is no reason not too.

Here is a link http://www.tekrispower.com/pdfs/xant...20Charging.pdf

Steve
Great read Steve, Thanks.

This morning it was 70 degs with A/C, drove to work and the Volts where 14.2 ?
__________________
Mark
.


We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works.
Reply With Quote
  #8  
Old 05-29-2012, 11:29 AM
Shake-N-Bake's Avatar
Shake-N-Bake Shake-N-Bake is offline
Post Fiend
 
Join Date: Sep 2003
Location: Mesa AZ
Posts: 5,834
Shake-N-Bake has a spectacular reputation.Shake-N-Bake has a spectacular reputation.Shake-N-Bake has a spectacular reputation.Shake-N-Bake has a spectacular reputation.Shake-N-Bake has a spectacular reputation.Shake-N-Bake has a spectacular reputation.Shake-N-Bake has a spectacular reputation.Shake-N-Bake has a spectacular reputation.Shake-N-Bake has a spectacular reputation.Shake-N-Bake has a spectacular reputation.Shake-N-Bake has a spectacular reputation.
109 here last week and my volts were 14.3 at 65 mph....
Reply With Quote
  #9  
Old 05-29-2012, 12:14 PM
RV_Tech's Avatar
RV_Tech RV_Tech is offline
Postmaster
 
Join Date: Jan 2010
Posts: 3,795
RV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant future
Quote:
Originally Posted by Shake-N-Bake View Post
109 here last week and my volts were 14.3 at 65 mph....
Shoot, I was getting into the notion there was temperature compensation at work. Toss that idea out!

Steve
__________________
RVDA/RVIA Master Certified RV Technician
You think you're confused?
2002 F350 Dually, Rhino Liner, Edge Evolution (running in stock mode), 4" exhaust, 6.0 cooler
2010 F150 super cab, box stock, bed slide, ARE bed cover
Reply With Quote
  #10  
Old 05-29-2012, 12:46 PM
schonauer schonauer is offline
Freshman User
 
Join Date: Feb 2012
Posts: 31
schonauer is starting off with a positive reputation.
I have the arrow force gauge and my truck does the same thing,when hot out 13.7 with or without ac when cool out 14.3.When It's hot out and I start the truck for the first time that day I get 14.3 but when the truck get's up to temp it will go down two 13.7.
Reply With Quote
  #11  
Old 05-29-2012, 07:23 PM
maevans's Avatar
maevans maevans is offline
Posting Guru
 
Join Date: Sep 2005
Location: Monroe Michigan
Posts: 2,469
maevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud of
Quote:
Originally Posted by schonauer View Post
I have the arrow force gauge and my truck does the same thing,when hot out 13.7 with or without ac when cool out 14.3.When It's hot out and I start the truck for the first time that day I get 14.3 but when the truck get's up to temp it will go down two 13.7.
Yep, thats exactly the same thing my truck is doing.

What year is your truck ?



I stopped by my local BATTERY WHOLESALE after work today and the alternator and batterys tested fine.
__________________
Mark
.


We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works.
Reply With Quote
  #12  
Old 05-29-2012, 07:26 PM
RV_Tech's Avatar
RV_Tech RV_Tech is offline
Postmaster
 
Join Date: Jan 2010
Posts: 3,795
RV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant futureRV_Tech has a brilliant future
Quote:
Originally Posted by maevans View Post
Yep, thats exactly the same thing my truck is doing.

What year is year truck ?



I stopped by my local BATTERY WHOLESALE after work today and the alternator and batterys tested fine.

So the alternator is topping off the batteries and then drops back to under 14 volts to avoid cooking the battery.

That is a pretty standard program with most charging systems. You have to get over 14 volts to top them off, but sustaining it will damage the batteries. If the batteries are weak or low on water, it will continue to try topping them off.

Steve
__________________
RVDA/RVIA Master Certified RV Technician
You think you're confused?
2002 F350 Dually, Rhino Liner, Edge Evolution (running in stock mode), 4" exhaust, 6.0 cooler
2010 F150 super cab, box stock, bed slide, ARE bed cover
Reply With Quote
  #13  
Old 05-29-2012, 07:53 PM
maevans's Avatar
maevans maevans is offline
Posting Guru
 
Join Date: Sep 2005
Location: Monroe Michigan
Posts: 2,469
maevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud of
Quote:
Originally Posted by RV_Tech View Post
So the alternator is topping off the batteries and then drops back to under 14 volts to avoid cooking the battery.

That is a pretty standard program with most charging systems. You have to get over 14 volts to top them off, but sustaining it will damage the batteries. If the batteries are weak or low on water, it will continue to try topping them off.

Steve
Thanks for your replys and help Steve, Much appreciated.

But I need to ask, would'nt I be cooking my batteries too in the cooler temps and the Volts at a steady 14.3 ?
__________________
Mark
.


We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works.
Reply With Quote
  #14  
Old 05-29-2012, 07:56 PM
schonauer schonauer is offline
Freshman User
 
Join Date: Feb 2012
Posts: 31
schonauer is starting off with a positive reputation.
My truck is a 2000 alternator and batteries less than a year old,even with the old batteries and alternator it was the same.
Reply With Quote
  #15  
Old 05-29-2012, 08:06 PM
maevans's Avatar
maevans maevans is offline
Posting Guru
 
Join Date: Sep 2005
Location: Monroe Michigan
Posts: 2,469
maevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud ofmaevans has much to be proud of
Quote:
Originally Posted by schonauer View Post
My truck is a 2000 alternator and batteries less than a year old,even with the old batteries and alternator it was the same.
Have you notice in the winter months the Volts being a steady 14.3 volts ?
__________________
Mark
.


We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works.
Reply With Quote
Old 05-29-2012, 08:06 PM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Diesel > 1999 - 2003 7.3L Power Stroke Diesel

Tags
2000, f250, great, hot, hotter, morning, normal, operating, starts, trucks, volt, volts, weak, weather

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Torque Pro Ford 6.7L Extended PIDs MPD56 6.7L Power Stroke Diesel 72 10-14-2014 06:56 AM
Part info request –Rebuild automatic steering column shifter assembly NoDough66 1961 - 1966 F-100 & Larger F-Series Trucks 2 08-16-2013 01:53 PM
What should I buy? JF_VIKINGSFAN Super Duty & Heavy Duty 17 12-22-2012 06:59 AM
Need a starting place for 6.0 Engine Issue ten.mile Super Duty & Heavy Duty 2 12-11-2012 05:56 PM
6.0 Baro/Map Problem longcut13 6.0L Power Stroke Diesel 6 06-13-2012 03:54 PM



All times are GMT -5. The time now is 11:09 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup