Glow plug battle
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Tuned
Joined: Jul 2004
Posts: 371
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From: Upstate SC
Glow plug battle
I'm fighting a find the weakest link battle on my '01 F250. Turns out my glow plug relay wasn't working. So I replaced it. But, when my glow plugs finally kicked in, my batteries can't take it. Time to see if either us worth keeping.
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Joined: Aug 2012
Posts: 56
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I went to Harbor Freight and bought a battery analyzer.
Digital Automotive Battery Analyzer
This instrument will give you the CCA value for your batteries.
It will help to determine when they are ready to be replaced.
As I understand, it takes 850 CCA between both batteries to crank a 7.3.
That would mean that when the batteries are at about half strength you replace them.
However I am not sure what waiting that long does to your starter.
On a side note, I have 4 batteries in my boat, one pair for each engine.
One pair got to where they would not start the engine.
Normally I would have replaced all 4, but this time I tested them and found one of each pair was 95%, the other two were bad. I kept the good ones and replaced the bad ones.
Now I check all of the batteries periodically and will replace when failing.
LA
Digital Automotive Battery Analyzer
It will help to determine when they are ready to be replaced.
As I understand, it takes 850 CCA between both batteries to crank a 7.3.
That would mean that when the batteries are at about half strength you replace them.
However I am not sure what waiting that long does to your starter.
On a side note, I have 4 batteries in my boat, one pair for each engine.
One pair got to where they would not start the engine.
Normally I would have replaced all 4, but this time I tested them and found one of each pair was 95%, the other two were bad. I kept the good ones and replaced the bad ones.
Now I check all of the batteries periodically and will replace when failing.
LA
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