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1.6 IAC question

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Old 08-31-2020, 06:04 PM
  #1  
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Default 1.6 IAC question

I did some searching and wasn't able to find much. Today while upgrading the injectors in my 1.6L Miata when I took the part of the IAC off that bolts to the intake manifold I noticed that it has a gasket in there that is blocking the entire passage off to the IM.

Trying to figure out why it would be blocked off and if I should restore it back to how it should be. Car is currently running on a DIY MS3 and idles ok for the most part.
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Old 09-01-2020, 08:01 AM
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Originally Posted by ATeamM
I did some searching and wasn't able to find much. Today while upgrading the injectors in my 1.6L Miata when I took the part of the IAC off that bolts to the intake manifold I noticed that it has a gasket in there that is blocking the entire passage off to the IM.

Trying to figure out why it would be blocked off and if I should restore it back to how it should be. Car is currently running on a DIY MS3 and idles ok for the most part.
It's a fast idle valve that's only used when the car is cold. If it's blocked off then someone thought it might help the car idle, I'm guessing.


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