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Old 01-04-2011, 10:00 PM
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azitizz azitizz is offline
MB 1985 300TD Wagon
 
Join Date: Apr 2009
Location: Winnipeg, Canada
Posts: 422
Quote:
Originally Posted by funola View Post
Did you rev the engine above 1500 rpm when you measured the 12.4 V? If you really did get 13.7 volts after shutting the car off and the battery charger was not connected, something is wrong. Fully charged battery voltage chould be about 12.7 volts.
I reved it above 1500 only to keep it from stalling on me before it was warm enough. But I'm doing this solo so I had no way of taking a reading and reving it at the same time. Oh wait, I guess i could have done this using the throttle in the engine right? Duh.....

...So I just made the measurement and revved it up to probably at least 2500 or even 3000 rpm and the voltage never budged. It seemed to slightly climb weather or not the engine was revving or idling. It was showing about 12.5 V.

Then when I shut it off it almost stayed the same but climbed slowly to 12.7V over a period of about 3 or 4 minutes. I Imagine it continued climbing but I havent been out to check again.

Last edited by azitizz; 01-04-2011 at 10:34 PM.
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