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280z voltage issues


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My alternator was not producing enough voltage so I replaced it...ran it for a few days and the volt meter hovered smack in the middle between 12v and 16v.

 

lately when the car is running the volt meter will spike past 16v when the exterior lights are turned off. 

When I turn on the exterior lights, the volt meter will stay between 12 and 16 and stay there. 

 

what gives? Do I need to replace my voltage regulator?

 

 

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Need to have good ground path, charging wire, and sensing wire to have an IR Alternator work correctly.

 

If you got voltage drop on the sensing wire the reg will boost output to get 13.8 on that sensing wire whenever possible.

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