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Truck will not keep charge

Tiny
KOELZER
  • MEMBER
  • 2003 FORD F-350
  • 6.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
My truck wouldn’t start this morning. Friend jumped it, it started acting weird as I drove, pulled over to a Walmart. It was acting like it was about to shut off again (gas gauge kept going towards empty and bouncing, was full of gas). I kept revving it to keep it going as my wife ran inside Walmart. Truck ended up shutting off. Had tow company attempt a jump start. It started up 3 times but would act up then shut off. Ended up getting towed. Nearest diesel shop can’t see my truck for 3 more weeks. Yikes! Please help.
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Wednesday, November 27th, 2019 AT 12:53 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

You have low voltage. That is the reason it wont run right.

https://www.2carpros.com/articles/how-to-charge-your-car-battery

If the alternator is not working, it will try to run off the battery. If the battery is less than 12.2 volts, it will not run correctly.

I would charge the batteries up to 12.6 volts.

https://www.2carpros.com/articles/car-battery-load-test

Then start the truck and check the voltage at the battery with it running.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Let me know the results.

Roy
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Wednesday, November 27th, 2019 AT 1:17 PM

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