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Starter Going Out?

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Old Oct 28, 2020 | 06:56 AM
  #1  
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Starter Going Out?

I have a 2016 F-250, 6.7L with just shy of 60,000 miles on it. I've noticed the past week, it has started to have intermittent weak/slow cranks the first few cranks, then will speed up to normal right before it starts. It doesn't take any longer to crank before it starts, just the first few cranks sound weak. It doesn't do it every start either.

The batteries are about a year old and measure a little over 12v with the engine off. With the engine on, they measure about 14.4v, so I feel the batteries and alternator are fine. Is the starter starting to go out?

TIA
 
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Old Oct 28, 2020 | 01:13 PM
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Sounds more like the batteries....What the batteries carry for volts at rest and running does not tell you what they are doing with a load, so with your digital meter...I assume you have one, when it's cold in the morning, put your meter on the battery then as you crank the motor watch the volts, if they drop down to the 9v or 10v range causing the motor to turn slow for a moment, I would think you probably have a weak cell in one or both batteries, or you can go to the auto parts store and see if they'll do a load test for you.
 
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Old Oct 28, 2020 | 01:55 PM
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Agree with Mike1 - sounds like a weak battery. Doesn’t take much of a drop in voltage to cause all sorts of issues. 12v is too low.

When the starter on my 2006 F350 died maybe four years ago, it was immediate (no warning). Worked normally, and then it didn’t work at all.

Charge both batteries up and see what the starter sounds like.

 
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Old Oct 28, 2020 | 02:21 PM
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Batteries should be above 11.3v while cranking. They should also be 12.6v at rest.
 
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Old Oct 28, 2020 | 03:35 PM
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Thanks for the suggestions, I'll check the batteries during a crank. I didn't think about the initial load being too much.
 
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