Re: Erratic temperature gauge

["Douglas Hurst Quebbeman" <dougq@[192.107.41.17]>]

> From:          "John Torset" <johnt@borre.mail.telia.com>
> Subject:       Re: Erratic temperature gauge

> >When the engine is running, the alternator should be supplying the
> >electrical needs of the car, including the idle system. So why is it
> >that battery voltage would play a role?
> 
> Not battery voltage, charge voltage. Battery voltage is always about 12V execpt when it's
> almost empty or you have a malfunction battery cell or two :).
> 
> To charge a battery you need a larger charging voltage than the battery, the higher
> the voltage, to a certian point - about 14.8V - where the battery life gets significaly
> shorter, the faster the battery charges. The charging voltage should be no lower than 14.2
> Volt. 

When I started the tq this evening after work, I set the A/C 
controller to display the voltage it sees, which I would hope to be 
the same as the charging voltage. I had 14.1 volts. As the engine 
warmed up, it fell into the 1300-1400 rpm oscillation. I was still
reading 14.1 volts.

Still can't understand what's going on.

--
-Douglas Hurst Quebbeman
"The large print giveth, and the small print taketh away."  -Tom Waits