7.3 starting problem - Ford Powerstroke Diesel Forum
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Old 04-09-2014, 05:15 AM
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7.3 starting problem

I've got a 2000 F350 and every so often it just doesn't have any cranking power......like a weak battery. I checked the batteries and they check ok but if I do much short driving , shutting the engine off and starting it two or three times thru out the day .... about the end of the day .....it doesn't have enough battery power to start it....has had a new starter within the last couple of monthes and it goes thru a carquest alternator every year. Have had shorted batteries in the past .......but this just acts like a bad battery or connection yet the cables are new.....any ideas? is in a wrecker so it gets pretty hard use.
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Old 04-09-2014, 05:31 AM
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Check ground wires make sure they have clean contact would be my first suggestion. I assume you have checked the output of the alternator, I would clean battery terminals also.
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Old 04-09-2014, 06:43 AM
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What did you do when you "checked the batteries and they check ok"?

These are High Capacity batteries and require a High Load load test (not something Auto Zone can do with their 100A testers)
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Old 04-14-2014, 11:00 AM
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thanks , will have to do a load test.....one other thing.....every time it does this......the wipers cycle on....it just did it a few minutes ago.......I went to start it and the batteries acted low......it did start and the wipers cycled......
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Old 04-14-2014, 11:15 AM
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ALL KINDS of crazy things can happen when the Voltage goes too low. Sounds like batteries might just be on their way out, go someplace that can do a proper Load Test (250-300A) on Each, Fully Charged battery (one at a time).
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Old 04-14-2014, 11:34 AM
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Check batts and alternator
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