Optima Battery Failure Characteristics, Engine Turns over slower and slower |
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Optima Battery Failure Characteristics, Engine Turns over slower and slower |
Spoke |
Jan 21 2008, 11:01 AM
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#1
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Jerry Group: Members Posts: 6,994 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
I have a red top Optima battery in my 74 and over the last few months, the engine has been turning over slower and slower. What are the characteristics of the Optima when it is going bad?
Lead acid batteries usually just dump and won't start the car. I haven't checked the voltage at rest or while the engine is running to see if it's the battery or my charging system. I guess that will be tonight's activity. Can I use an external charger to try to put a full charge on the battery? Thanks, Spoke |
Spoke |
Jan 26 2008, 11:54 AM
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#2
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Jerry Group: Members Posts: 6,994 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Did some measurements today with the engine running.
At idle, battery voltage measured: No lights: 13.69V Parking lights: 13.37V Headlights: 13.10 to 13.60 Engine Revving: No lights: 13.84V Parking lights: 13.60V Headlights: 13.40V After turning engine off, battery voltage after 1/2 minute was 12.70V I was thinking I should see some voltages in the 14's at least during revving. |
banger |
Jan 26 2008, 08:20 PM
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#3
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Member Group: Members Posts: 354 Joined: 12-November 06 From: Santa Clarita Member No.: 7,205 Region Association: Southern California |
I believe that 13.8 is usually wht most regulators are set for. You could also try a solid state regulator, and see if it is a little better.
Did some measurements today with the engine running. At idle, battery voltage measured: No lights: 13.69V Parking lights: 13.37V Headlights: 13.10 to 13.60 Engine Revving: No lights: 13.84V Parking lights: 13.60V Headlights: 13.40V After turning engine off, battery voltage after 1/2 minute was 12.70V I was thinking I should see some voltages in the 14's at least during revving. |
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