Voltage Question - Team Camaro Tech
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post #1 of 6 (permalink) Old Dec 29th, 11, 06:36 AM Thread Starter
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Eric
 
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Voltage Question

Been poking around on my '69 and noticed I have 12.67 at pos batt. term and Buss bar. Took out resistance wire to coil,changed to 14 gauge wire for my ignitor. Checking voltage at pos. coil term. I get 11.20, that don't seem right to me. Shouldin't it be the same as the Buss. bar? Any feed back would be welcomed. Thanks

Last edited by L30 327; Dec 29th, 11 at 08:37 AM.
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post #2 of 6 (permalink) Old Dec 29th, 11, 05:09 PM
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Re: Voltage Question

What you have there is voltage drop. It's caused buy poor connections, old wiring and stuff a long way away from the battery. Bad earths can sometimes cause the same thing. I'd go through things along the way and make sure any junctions are squeaky clean and well connected. You'll always get some.. but the less there is, the better things operate.
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post #3 of 6 (permalink) Old Dec 29th, 11, 05:35 PM
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Re: Voltage Question

Disconnect coil neg terminal and measure again.
If circuit is drawing current, voltage will be lower. Open circuit, voltage should go up.
David gives good suggestions.
Also, make sure there is no noticable voltage between any engine ground and neg battery post, typically, less than 0.4 volts.

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post #4 of 6 (permalink) Old Dec 29th, 11, 08:53 PM
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Re: Voltage Question

I hope that your 12.67 volts is with the engine not running. Running you should be ~14.1


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post #5 of 6 (permalink) Old Dec 30th, 11, 05:26 PM Thread Starter
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Eric
 
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Re: Voltage Question

Quote:
Originally Posted by BPOS View Post
I hope that your 12.67 volts is with the engine not running. Running you should be ~14.1
Engine running I've got 14.57, I'll check again with neg. coil disconnected thanks for the replies.
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post #6 of 6 (permalink) Old Dec 31st, 11, 04:09 AM
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Re: Voltage Question

The 14.5 volts should be alittle less after driving the car for 10-15 miles, 13.8 maybe.
With engine running, what is the coil+ voltage?

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