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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.


 
 
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Old Tue, June 14th, 2011, 02:40 PM
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Longshot270 Longshot270 is offline
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The alternator can only work so hard without burning up. You could either run the risk of overcharge or having parts burn up. If your current alternator isn't cutting it then you'll need to go bigger mechanically. If you are having trouble at idle you could try to raise the idle speed. Kinda like I can program my truck to rev all the way to 10K, but the mechanics might not survive.
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