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Idle stabilizer humming

Sei
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Sei Member

Sei

Posted
Posted

Should I be concerned about the audible hum coming from the idle stabilizer (996.606.160.01)? Car runs fine just the annoying hum when ignition on.

-1999 996 C2

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted

That Idle Control Valve is just a solenoid. Mine does not hum - at least not that I can hear. Are you sure you are not hearing the secondary air pump at startup?

Sei Member

Sei

Posted
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Posted

I can hear it from outside the car without the engine running. When I disconnected, silence. Car runs fine otherwise.

1999Porsche911 Member

1999Porsche911

Posted
Posted
i have the same noise. can hear it without cranking the engine. is it normal?

Verify that it is indeed the ICV by unplugging it. If it is the ICV, it should make no noise and needs replacing if the noise bothers you. You may first try cleaning it by removing and spaying with carb cleaner.

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