First post here, picked up a 85 GT a couple of months ago. Since buying it I have done a few upgrades. When I purchased the car it already had a griffin aluminum radiator and dual electric fans. The previous owner had just one fan running constantly as soon as you turned to key on. It had probelems getting to temp, so I ordered a painless dual fan wiring harness from summit and installed it. Fans work great, no issues there. While it was down, i also put in an Anderson n41 camshaft. At idle it has around 10-11 inches of Vacum. Now my problem is I when the fans come on, the idle will drop 150-200 rpm, when the A/C comes on it will want to drop even more to the point of trying to go dead. I've been reading a lot about the stock charging system, and basically it needs upgrading. The battery has the date 6/14 on it. It could be weak, but my question is does this sound like a charging issue or something else? How do I check to see if my alternator is charging like it's supposed too? I'm 99% sure it's the stock alternator, but I can upload a picture so people can be sure. Could it just be a weak battery? What's also weird is i can set the idle when it's at operating temperature and drive it for a little while and the idle will randomly go up 2-300 rpm. It may be a completely different issue, not really sure. Thanks!
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