Go Back   PowerStrokeArmy > Power Strokes > 7.3 Tech

Reply
 
Thread Tools Display Modes
  #31  
Old 01-10-2021, 10:32 PM
Denver's Avatar
Denver Denver is offline
Lieutenant
Member's Gallery
 
Join Date: May 2011
Location: America
Posts: 764
Default

I took the batteries out and had them tested at Napa. They failed. 1 year old motorcrafts. 850cca. Napa testing device showed one was only producing low 500's cca at 12.4 volts and the other was high 400's cca at 12.3 volts. Ended up getting new Napa batteries as the Fords were a warranty set and the prorate would probably be little by now.

Installed the Napa ones and it started right up. Key off was showing 12.6 volts. Key on 12.1 volts. Key on starting it went to 11.3 volts. Charging volts is 14.46 within a minute, maybe 20 - 30 seconds after start. Haven't driven the truck yet but have a battery tender on them topping off the voltage.

I'll see if replacing the batteries fixes this intermittent no start issue. I'll report back over time. This was a first though for finding out the batteries were bad. Usually it's just been a slow crank right away or they are just dead. This one threw me off as it turned over strong, for about 20 - 30 seconds though and then it got slow. They were also a year old. I've had some batteries go dead in a year but was usually only one of the two, instead of both.
  #32  
Old 01-10-2021, 10:37 PM
Denver's Avatar
Denver Denver is offline
Lieutenant
Member's Gallery
 
Join Date: May 2011
Location: America
Posts: 764
Default

Quote:
Originally Posted by CTC DEEZUL View Post
Hows the big power wire that's behind driver battery that's right atop the fender well? See if it's clean
It looks good and is tight on the stud at the battery. I was taking a strong look at it. There is a connection right behind the airbox on the fender liner I was thinking of messing with. Is it some type of breaker or fusible link?
  #33  
Old 01-10-2021, 10:54 PM
CTC DEEZUL's Avatar
CTC DEEZUL CTC DEEZUL is offline
General
Member's Gallery
 
Join Date: Jun 2011
Location: NWI
Posts: 5,811
Default

No that's the cab /fusebox power feed connection. I wanted to make sure he's good. Very intermittent issues there
__________________
Teamsters Local 444- Rolling Coal United
  #34  
Old 01-10-2021, 10:58 PM
CTC DEEZUL's Avatar
CTC DEEZUL CTC DEEZUL is offline
General
Member's Gallery
 
Join Date: Jun 2011
Location: NWI
Posts: 5,811
Default

Do you have a chip in the PCM?
__________________
Teamsters Local 444- Rolling Coal United
  #35  
Old 01-10-2021, 11:16 PM
lincolnlocker's Avatar
lincolnlocker lincolnlocker is offline
General
Member's Gallery
 
Join Date: May 2011
Location: central Michigan/ New York
Posts: 26,768
Default

Batteries and alternator can play a huge roll in run ability issues...

live life full throttle
__________________
00,f350,4x4,cc,drw. Sold... good bye ole girl. I will miss you
15,f350,4x4,cclb, not stock
god bless america and the farmer who feeds your fat ass
  #36  
Old 01-10-2021, 11:17 PM
Denver's Avatar
Denver Denver is offline
Lieutenant
Member's Gallery
 
Join Date: May 2011
Location: America
Posts: 764
Default

Quote:
Originally Posted by CTC DEEZUL View Post
Do you have a chip in the PCM?
No chip or tune in the truck and it's never had one.
  #37  
Old 01-11-2021, 06:45 AM
CTC DEEZUL's Avatar
CTC DEEZUL CTC DEEZUL is offline
General
Member's Gallery
 
Join Date: Jun 2011
Location: NWI
Posts: 5,811
Default

I'd back probe all powers at IDM PCM while cranking and see what's getting good power
__________________
Teamsters Local 444- Rolling Coal United
  #38  
Old 01-11-2021, 06:46 AM
CTC DEEZUL's Avatar
CTC DEEZUL CTC DEEZUL is offline
General
Member's Gallery
 
Join Date: Jun 2011
Location: NWI
Posts: 5,811
Default

Or send them both to Johnathon so he can test them both on the bench. It really does clear up potential issues with them and eliminates alot of guess work and dio
__________________
Teamsters Local 444- Rolling Coal United
Reply

Thread Tools
Display Modes

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 Off

Forum Jump


All times are GMT -6. The time now is 03:14 AM.

 

Powered by vBulletin®
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

Designed by Military Ltd