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small problem?

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Old Jan 8, 2009 | 05:38 PM
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rockin300
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From: lost in WI
Thumbs down small problem?
every time i rev my engine my battery light comes on and the gage hits 18
what could cuase this and how can i fix it
 
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Old Jan 8, 2009 | 05:40 PM
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touch more info needed.
 
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Old Jan 8, 2009 | 06:30 PM
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bad voltage regulator would be the first deduction.
 
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Old Jan 8, 2009 | 06:40 PM
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BigBlueOx
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yes bad voltage reg. Is what id say. Try puting a meter on the battery and have someone rev it to check.
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Old Jan 8, 2009 | 06:59 PM
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Yes, my vote also. Suggest go to Autozone or whatever and have it tested, voltage that's too high can damage stuff quickly. If you check with meter and it really is over 18, trouble's soon a commin' Happy wiring.
 
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Old Jan 9, 2009 | 07:40 AM
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Sounds like a voltage regulator to me as well. You can tear into the alternator or spend the $150+ and go ahead and replace the alternator.

Originally Posted by BigBlueOx
yes bad voltage reg. Is what id say. Try puting a meter on the battery and have someone rev it to check.
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Old Jan 9, 2009 | 10:17 AM
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i just had the alternator replaced it doesn't do it when im driving only when im in park and i hit the gas to the floor

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Old Jan 9, 2009 | 10:21 AM
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Originally Posted by rockin300
i just had the alternator replaced it doesn't do it when im driving only when im in park and i hit the gas to the floor
then stop doing that.

you are keeping your info to yourself so we do not know what year or anything.

you do know the truck has a rev limiter?
 
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Old Jan 9, 2009 | 10:59 AM
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Something is still spiking your meter. So, chances are the trouble is still in the voltage reg which I guess is in you alternator, but I don't know your exact truck to say. Even if you rev engine it shouldn't spike like that. Is your alternator new OEM or rebuilt replacement. You might need to return it and change it out, could very well be defective.
 
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Old Jan 9, 2009 | 11:11 AM
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its a 1994 xlt 4x4 i6 its never done it before until last saturday the alternator is a oem replacement from Napa,all my info about my truck is in my sig
 
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Old Jan 9, 2009 | 05:01 PM
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Well I can't really compare, my volt gauge don't even work. But I still think it's in the voltage regulator. Even though it's a new alternator they can and WILL go bad.
 
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Old Jan 9, 2009 | 05:14 PM
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Originally Posted by rockin300
its a 1994 xlt 4x4 i6 its never done it before until last saturday the alternator is a oem replacement from Napa,all my info about my truck is in my sig
funny, it did not say new alternator in sig.

that was the kind of info i was asking.

just because it is new alternator, from napa or even ford, does not mean it is perfect.
 
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