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  #1  
Old 11-17-2009, 08:58 AM
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BATTERIES

My batteries are original from 03. Truck starts well but seems to crank longer when cold.. like over night and kinda cranks strong at first then get weak but fires up. When I say cranks long... like 2 sec. when warm 1/2 sec..... batterries did go dead and got charged by a charger and seems to hold voltage. just wondering if I should replace anyways. What are some things that would be affected by bad batteries.
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Old 11-17-2009, 06:20 PM
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beleive it or not batteries affect alot. now people will say didnt things but normally batterys are only good for 3-5 years so if they are original from 03 i would replace them especially if gets cold where you live. and you dont have to buy motorcraft batterys just as long as the batterys have at least 750 cca
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Old 11-17-2009, 06:22 PM
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ac delco is the only battery I know of that offers 50 month replacement.
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Old 11-18-2009, 12:24 AM
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Well at 10 volts you useually can't get it to roll over at all. At less than 9 volts the PCM; FICM and most any other modules won't work. Weak batteries after a long enuff period of time can fry the voltage regulator in the alternator.
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Old 11-18-2009, 05:36 AM
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Mine is an 03 also and it has the original batteries in it, no problems yet.

Is what I am amazed at, my wife drives a 96 Explorer and we just changed the original battery.
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Old 11-18-2009, 05:44 AM
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I believe batteries put out less amperage in colder temps. Plus the block is cold, the oil is cold. I get a slow first couple cranks when its gets colder.
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Old 11-18-2009, 05:18 PM
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do the batteries, they will make a huge difference, just replaced the original ones in my dads 04 and made a HUGE difference my 04 still has original batteries night and day between the trucks
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Old 11-19-2009, 05:18 AM
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Weak batteries will cause the FICM to work overtime to create 48 volts to fire injectors. This will dramatically reduce the life of the FICM. That is a $ 1,000.00 to replace. Smart money says change your batteries. Dannyboy is correct weak batteries effect several other components.
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  #9  
Old 11-19-2009, 05:40 AM
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How do yalls batteries last so long?? Mine went out within a year that I had the truck. Lol
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