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Thread: alternator output ?

  1. #1

    Default alternator output ?

    new alternator is putting out 15.34 volts. is this to high? I'm thinking it should be 13-14 volts.

  2. #2
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    Do you trust your voltmeter? What reading are you getting with the car not running?

  3. #3

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    both of my volt meters was reading 15.3 running and 13.4 not running

  4. #4
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    Return it for another one?

  5. #5

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    Did you get it local??

    Take it back and have them test it.

  6. #6

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    Quote Originally Posted by POS Racing View Post
    Did you get it local??

    Take it back and have them test it.
    Agree, seen too many sketchy rebuilts from the parts houses. We had two in a row from O'Reality that actually tested fine on the bench but were not throwing full power over 4500 RPMs.

  7. #7

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    Was the high voltage measured when it was very cold/cold? I have a ScanGauge and monitor the voltage on my 06 continuously. The voltage runs higher in the 13-14 range when it is cold. I have never seen it in the 15 range.
    Gabriel

  8. #8

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    I believe the spec for many cars is 13.5 to 15.5. I would search for the Miata spec range.

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