Join Date: May 2017
Location: Prescott, Arizona
Charging System Oddity
I've been lucky to get through 50 years of owning cars without ever having any charging system problems. As a result of this dumb luck I have no real hands on experience with alternators and the like.
My S4 voltmeter typically shows just over 12 volts upon start up and measures
12.6v at the battery with my multimeter at idle. After driving about 1 mile the voltmeter jumps up to the 13.5v range and stays there for the duration of my drive. When I'm back in the garage the battery voltage at idle shows 13.6 which I believe is just right.
The p.o. mentioned this to me and said he'd never gotten to the bottom of it.
Anyone know what's up with this?
1991 S4 Spider "Gabriela", 2017 VW Golf R, 2018 VW GTI,
Previous obsessions; 2006 Mustang GT, 2006 BMW Z4M, 5 other Bimmers, Capri V6, Renault 5, Lotus Cortina, Sunbeam Alpine, Ducati Diana Mk 3, Norton Commando