Time for new batteries? Update
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
What is the specific gravity measurement of each cell? Volts are not really telling you the complete story, low volts could be from alternator not working properly, the other is to load test separately. One bad cell out of both batteries will get you this lower voltage and likely won't allow full charging from the alternator either. Alternatively,p if the SGs are good in every cell, then you are going to need to look at alternator charging volts, should be 14.4 at first start, should go up to 14.8 as glow plugs shut off. If it's not hitting 14.8 volts on the alternator charge cable you have an alternator problem, until you solve this your taking a toll on the FICM, though your FICM is looking good now, the more starts at the low voltage he possibility of damage. If you do need an alternator, go with the Ford upgraded 140 amp at minimum, better still a DC power or higher amperage which will charge the batteries up better! protect the FICM.
More Turbo
Joined: Feb 2005
Posts: 574
Likes: 3
From: Grand Rapids,MI
The amp draw on these engines during start are high and batteries should be replaced before four years to protect the FICM. You might get longer life in warmer area's of the US due to limited glow plug use.
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
What is the specific gravity measurement of each cell? Volts are not really telling you the complete story, low volts could be from alternator not working properly, the other is to load test separately. One bad cell out of both batteries will get you this lower voltage and likely won't allow full charging from the alternator either. Alternatively,p if the SGs are good in every cell, then you are going to need to look at alternator charging volts, should be 14.4 at first start, should go up to 14.8 as glow plugs shut off. If it's not hitting 14.8 volts on the alternator charge cable you have an alternator problem, until you solve this your taking a toll on the FICM, though your FICM is looking good now, the more starts at the low voltage he possibility of damage. If you do need an alternator, go with the Ford upgraded 140 amp at minimum, better still a DC power or higher amperage which will charge the batteries up better! protect the FICM.
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Certified Thread Hijacker
Joined: Aug 2001
Posts: 14,441
Likes: 60
I would concur you are needing a set of batteries.
I'll add the OEM batteries in my previous 2005 lasted from Fall 2004 to early Spring 2008.
I have no real clue about my current 2006, however, it had a set of Motorcrafts that I replaced last year, if original would have made them 7 years old.
Josh
I'll add the OEM batteries in my previous 2005 lasted from Fall 2004 to early Spring 2008.
I have no real clue about my current 2006, however, it had a set of Motorcrafts that I replaced last year, if original would have made them 7 years old.
Josh
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I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
Likes: 27
From: Central Oregon
Got new Batteries for the truck.
Here is the start,
Interstate Batteries.
Product ID: MTP-65
Cranking Amps: 1000
Cold Cranking Amps: 850
Voltage: 12
Capacity: 85
Termination: Common Code A
Weight: 45.4
Width: 7.5
Length: 12.00
Height: 7.50
Plates: 24
WET/DRY: W
$113.95 +tax for each.
Here is the start,
Interstate Batteries.
Product ID: MTP-65
Cranking Amps: 1000
Cold Cranking Amps: 850
Voltage: 12
Capacity: 85
Termination: Common Code A
Weight: 45.4
Width: 7.5
Length: 12.00
Height: 7.50
Plates: 24
WET/DRY: W
$113.95 +tax for each.
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theologian
1999 - 2003 7.3L Power Stroke Diesel
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Nov 14, 2003 07:02 PM