Starting and charging problems - Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 6 Old 10-03-2010, 11:42 AM Thread Starter
Member
 
Join Date: Mar 2009
Posts: 57
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Question Starting and charging problems

Hey hope everyone is having a good Sunday. Here is my problem:
A week ago my excursion was having an issue starting. It progressed to needing a Jump. So I took it to autozone and had it tested. They said one of the two batteries needed to be replaced. So I did that and they tested the alt and their tester said the alt passed the test. First few starts were strong then then they became progressively weaker. I metered the alt output both times when it did start and it metered between 12.6 and 12.9 volts at idle. Isn't that a little too low to charge a two battery setup? Is there anything else I am overlooking? Thanks again.
kzman77 is offline  
post #2 of 6 Old 10-03-2010, 12:03 PM
Compression Ignition Addict
 
strokin95style's Avatar
 
Join Date: Mar 2008
Posts: 644
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
check the battery cable terminals, if they are the slightest bit loose, it will make a big difference. Having similar issues with mine, waiting on the dealer to get my new battery cable in since its 15 years old

Nater
1995 f-250 rclb
7.3~317k miles & countin
3" Downpipe
Superduty 10.5" 3 pinion Trac-Lok rear
Dana 60 s.a.s

1997 ccsb , 353,500 miles
5" lift on 315x75x16 cooper at3's.
Clear headlights, tinted tails, rear buckets,
Dana 60 swap, zf5 swap.
rosewood 180/100's, t500 hpop, php hydra, e fuel.
strokin95style is offline  
post #3 of 6 Old 10-03-2010, 01:09 PM Thread Starter
Member
 
Join Date: Mar 2009
Posts: 57
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
So loose or worn battery terminals would affect the output voltage on the alt? Also where can I get a new + battery cable since it's the linked cable for 2 batteries?
kzman77 is offline  
post #4 of 6 Old 10-03-2010, 01:19 PM
Lifetime Premium Member
 
jbeasts10's Avatar
 
Join Date: Apr 2008
Posts: 6,100
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Alt. output should be around 14 volts.
jbeasts10 is offline  
post #5 of 6 Old 10-03-2010, 06:18 PM
Compression Ignition Addict
 
strokin95style's Avatar
 
Join Date: Mar 2008
Posts: 644
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
wont affect alternator voltage, but will make a difference. I tried for 30 minutes tryin to jump start my truck this morning at 5:30 when it was like 35 degrees out and never got it started...even with starting fluid. i kept messing with the hot cable and found one that was barely loose and i squeezed a vise grip on it as tight as i could and when i turned the key it fired right up. if you dont have a good connection on both batteries and a good ground, the engine will not crank fast enough to fire. I picked up a new positive cable yesterday (saturday) from the local dealership for $75 with my discount. im not sure what they list for though. it took me about 30 minutes and i had it on. no more slow cranking, the engine spins over like its a brand new truck now. Im not saying that you need a new hot cable, but make sure all your connections are clean. the factory cable end on the pass side battery is known for breaking where both cables run into one connector. take 10 minutes and clean all 4 battery posts and see if that makes a difference on the starting issue. Good luck.

Nater
1995 f-250 rclb
7.3~317k miles & countin
3" Downpipe
Superduty 10.5" 3 pinion Trac-Lok rear
Dana 60 s.a.s

1997 ccsb , 353,500 miles
5" lift on 315x75x16 cooper at3's.
Clear headlights, tinted tails, rear buckets,
Dana 60 swap, zf5 swap.
rosewood 180/100's, t500 hpop, php hydra, e fuel.
strokin95style is offline  
post #6 of 6 Old 10-03-2010, 06:49 PM
Compression Ignition Addict
 
Join Date: Dec 2009
Posts: 1,283
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
This may sound dumb-but can you test alt. output with another meter?
If it passed at parts store-chances are the meter you are using may not be reading right-I see this all the time-depending on the quality of the meter,if you use another meter and reads the same then it's probably bad connections or overheated wiring
Not many people know this-but when copper/other bi-metals are cold-it's a conductor-but when over heated-it becomes a resistor (heat) very quickly,and won't let enough current pass through when hot.
Just some food for thought
icysmooth 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