giardia...

It ain't the water. It's our natural superiority in all things important.

A new observation. The alternator charges mucho better when the engine is cold, all the way up to 16v pegged on the gauge, unless you add a/c fan loads and condensor fan loads. As soon as it gets hot (and it's been HOT here), it reverts ot a max charge voltage of about 12.5 without loads and 12, slowly falling, with load. Must be above 2500rpms at idle to keep from discharging.

I think a diode is kaput (when it warms up), or the regulator goes on strike once it's little 'lectrons get too hot.