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Old 05-03-2009, 06:42 PM   #16 (permalink)
some_other_dave
Master EcoModder
 
Join Date: Jul 2008
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How's this for a test: Unplug all of the wires to the alternator. Check fuel economy. Then unhook the belt. Re-check economy. My belief is that you'll see a noticeable difference, which means that even when it isn't giving you any "juice", the alternator is still taking noticeable amounts of power to run.

-soD
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