My 84 mustang gt350 is all stock with a small cam in it. having problems with my battery charging. for years now with the lights on at idle they go dim and brighten up when I rev it up. if I check voltage at idle it is battery voltage if I rev it up to 2000 it goes up to 13.5. its got so its not wanting to start, it will click a few times then start. I dont want to convert to 3g or nothing. but what could be problem, alternator, voltage regulator? what should I change first?
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