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Low volts

This is a discussion on Low volts within the General Help forums, part of the LSx Technical Help Section category; guys I need some help. Here in New Jersey it just starting getting really hot again so I ran the ...

  1. #1
    Member jamessr's Avatar
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    Low volts

    guys I need some help.
    Here in New Jersey it just starting getting really hot again so I ran the AC for about 30mins. My voltage went into the 10-11 VDC area. I shut the AC off and rolled down a windon and it went back up to 12VDC. I cam here and researched the issue and the search showed that RPM's might be an issue. NP, I got my hand held and changed the RPM value to
    Idle AC on +100
    Idle AC off no change
    My rpm's at idle are normally around 650-700. I dont have any under drive pulleys. I put a volt meter on the battery while unning and I got 14VDC. I guess this weekend I'm going to change the battery because its 2 yrs old. The climate in NJ being hot/cold/hot then cold again could affect it.
    So now... I'm guessing my meter on my dash could be wrong, or I do infact have a rpm issue.

    I just wanted to bounce this off anyone for possible suggestions.
    Its a M6
    Exhuast, header,lid, Diable tune
    Thanks in advance
    Last edited by jamessr; 06-15-2008 at 02:04 PM.

  2. #2
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    If you suspect the battery bring it somewhere for a free load test, or where you purchased it - most have a 3 year free replacement warranty.

  3. #3
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    Your alternator could be getting weak. I can read good and charge the batery fine but when you load it down with the a/c, blower motor and the engine fan at the same time it just can't keep up. I get maybe one a month like this.

  4. #4
    That guy thearborbarber's Avatar
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    Many parts stores will test both alternators and batteries. That way you don't have buy something you don't have too.

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    Member scotthd's Avatar
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    battery is to start the car the alt runs it I would lean towards the alt....

  6. #6
    Member qwk93ta's Avatar
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    I would check the alternator like others have stated........

  7. #7
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    I kind of have the same problem, except I just bought a new battery and my battery gauge bounces all over the place it goes up to alittle over 13 Volts and then drops down to about 9 Volts and then back up and down. It does this the whole time I have the car on, anyone know what is going on.

  8. #8
    Veteran 0rion's Avatar
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    Quote Originally Posted by darkangel2002 View Post
    I kind of have the same problem, except I just bought a new battery and my battery gauge bounces all over the place it goes up to alittle over 13 Volts and then drops down to about 9 Volts and then back up and down. It does this the whole time I have the car on, anyone know what is going on.
    sounds like an alternator issue. Put a volt meter on dc volts across the battery while the car is running and see if it's bouncing around. If it is first make sure you don't have a loose/corroded wire and if everything looks fine there I'd start looking pretty hard at that alternator.

  9. #9
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    Quote Originally Posted by 0rion View Post
    sounds like an alternator issue. Put a volt meter on dc volts across the battery while the car is running and see if it's bouncing around. If it is first make sure you don't have a loose/corroded wire and if everything looks fine there I'd start looking pretty hard at that alternator.
    Yea I did that and my volt meter is reading 12.25 volts and doesn't move I guess I will be looking at that alternator

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