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Old 10-18-2009, 10:43 PM
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TheMonkey TheMonkey is offline
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Join Date: Apr 2006
Location: La Crescent, MN
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Default Erratic Voltage - Battery Killer

My son's '98 Firebird.... Has L36 V6 motor.

Old battery expanded and leaked. I asked him what voltmeter had been doing, he said it was wavering before battery completely killed.

Alternator bench tested okay.

Brand new battery went in. Volt meter on batt terminals look okay when no key in, look okay when turned to run, but as soon as car starts, voltage drops and is erratic between 0.5v - 8.0v. Immediately shut car off.

Any suggestions? Thx.

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