My voltage is jumping around - Team Camaro Tech
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post #1 of 6 (permalink) Old Apr 8th, 11, 01:26 PM Thread Starter
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Bill
 
Join Date: Jun 2010
Location: Upstate South Carolina
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My voltage is jumping around

The volt meter in my car reads around 13.5 when I'm running, but occasionally it will spike up to around 15.5 to 16. When this happens, the radio cuts out and the lights get bright of course.

What is the issue? Is the voltage regulator in the alternator bad?

Also, I'm having trouble getting my car to crank... like I have to ask people for jumps alot. Which always cranks the car right up.
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post #2 of 6 (permalink) Old Apr 8th, 11, 02:12 PM
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Camarodude67
 
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Re: My voltage is jumping around

Bad voltage regulator, should look into getting a 1 wire alternator
or just replace the voltage regulator...

Jeff G.
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post #3 of 6 (permalink) Old Apr 8th, 11, 02:20 PM
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Steps
 
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Re: My voltage is jumping around

If a self reguylated alternater I would suspect one of the diodes has sucked a kumura ..
Replace the alternator
If not a self regulated alternator suspect the regulator....how to check is in older posts.

It could simply be worn bearings, but if that bad one can usually hear them rumbling.
If worn bearings a simple $25 kit replace, plus the bushes and turn (smooth) armiture with leather boot stape, bit of kero and 280 wet /dry sand paper

My Spelling is not incorrect...it is creative

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post #4 of 6 (permalink) Old Apr 8th, 11, 03:32 PM
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Re: My voltage is jumping around

Could be a bad ground such as a bad alternator case to block ground, or bad ground at the regulator etc.

Dave
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post #5 of 6 (permalink) Old Apr 8th, 11, 04:34 PM Thread Starter
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Bill
 
Join Date: Jun 2010
Location: Upstate South Carolina
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Re: My voltage is jumping around

I should have mentioned that I am not using an external voltage regulator.
I'm going to take it back in to Advance to have them check it. I bought it there (remanufactored) about 9 months ago.
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post #6 of 6 (permalink) Old Apr 8th, 11, 10:42 PM
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Steps
 
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Re: My voltage is jumping around

Quote:
I bought it there (remanufactored)
Thats the problem these days..they dont always dismantle and check diodes (cant do it with them still soldered in..)
Samr goes with starter motors and they dont check contunity on the armitures when heated.....
Could just be a dry joint on a diode inside the alternator.

My Spelling is not incorrect...it is creative

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