Voltage Drop at 3,000 RPM
Since this morning, it appears that when I get higher in the RPM range (above 2500 - 3000 RPM), my battery gauge drops like a rock. When it does, the needle moves erratically. However, when I come to a full idle, the gauge resumes working perfectly fine.
I don't see any signs of belt wear or hear anything. Anything I should check before replacing the alternator?