Bad Voltage Regulator?
I think the voltage regulator in my 88 80Q has gone bad. I put a multimeter on the battery and it read 12.6v, perfect. But when I started the engine it shot up to 14.6v, even peaked as high as 15.2v. After the engine warmed up, I noticed the RPMs would drop about a hundred for a few seconds, during which time the mulimeter would go haywire. If this is the voltage regulator, does it require replacement of the entire alternator, or can the regulator itself be replaced? How much would either option cost (ballpark). Thanks a lot.