Fluctuating voltage after alternator install... what gives?

[masticatingcow]

I replaced the alternator on my '77 280Z and noticed that since the replacement, my volts occasionally fluctuate between 12V and about 14V on idle at 800 RPM. I bumped the idle up to 1000 RPM for the time being, but now, whenever I get open the throttle, the voltmeter pegs at 16V. Any ideas?

Yes, I have a FSM, but it's awfully vague about the alternator. In fact, it actually doesn't cover replacing it (probably since it's so straightforward), but instead REBUILDING it.

Please advise!

Thanks,

Brad

[evildky]

fluctuating from 12 to 14 is normal, pagging 16v on rev with no load can be ok too, but if it hits and holds 16v then you have a voltage regulator issue, it's located on the lower to middle inner fender on the passanger side, forward of the strut tower near the alternator, it's an easy part to replace, 2 bolts and one plug and your done