I had to change out an alternator this summer because it was putting out too much voltage. My amp kept cutting out and I thought it was the amp, but then I glanced down at my scangauge one day when the amp cut out and the voltage display read 16+Volts! I ordered the Maniac Motors high output alt, and while I waited for delivery, I was still driving the car, usually it was in the correct range, but once or twice a day it would spike up and the amp would always cut out when it spiked so I knew to look at the scangauge...one day it was reading almost 19V! Luckily I didn't blow anything or mess up the ecu, but it definitely pays to have a voltage gauge.
Zach - off to hear that an alternator ended up juicing more. Mine was the exact opposite, dropped down to 12.7. Glad you fixed it.
That's a little low, does it stay there? Mine will drop to 13.3 sometimes with all the lights on, blower on and rad fan kicked in plus lots of stop and go traffic, but usually it starts off at 14.3 and slowly ramp down to 13.5~9 depend on how long the drive is. I do have a Millenia alternator tho.
1994 MX-6 RS -- RIP 1/30/2012
1996 MX-6 M-Edition
1993 RX-7 Grand Touring
2010 Mazda3 Hatch Grand Touring
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