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182 Posts
just installed a new start n charge alt with uprgaded wire and a 3.2 pulley after having failing alternator symptoms. its like i still have the old one on. idle it drops into the high 11v and when i cruise it goes back up to 13.5. had the battery tested and it tested good. they said the alt was failing and was only outting out 30amps. what else could be wrong if its not the alt or battery? this is my old thread before i got my new alt http://www.modularfords.com/f17/voltage-problem-again-180821/