I started a new thread focusing on just my ammeter issue.
The below car has an issue with the ammeter bouncing around from just left of the center mark (1/4" or so) to the positive side of the ammeter about 3/4 up on the guage.
At idle, the ammeter is bouncing back and fourth fairly fast and when I bring the idle rpms up to around 1400rpms or so, the guage smooths out. The main volage gauge is jumping back and forth between 13 to 15 volts just as fast as the ammeter is bouncing.
From another thread, I changed out the voltage regulator and the ammeter and the voltage gauge is acting the same as before the swap.
Do I need to pull off my 1 year old alternator and have it checked?

Thanks