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Micro switch voltage

  • 1975
  • 911S
Fuel System
port charlotte, 

Troubleshooting cold hard start, backfire issue.  The cold start valve on my car is activated by a micro switch on the throttle body which is feed by power from the starter.  The voltage reads 10 volts when engaged.    Does anyone know if this is correct and if the cold start valve needs 12v to work.

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