Low idle

1985 NISSAN 300ZX
130,000 MILES • 3.0L • V6 • 2WD • MANUAL
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CMASTALSKI
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  • 3 POSTS
Cold start sensor does not work. Cranks up but idles low like no choke.
Dec 22, 2017 at 8:36 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good Morning my name is Roy and I will assist.

There is a coolant sensor that sends the ECM a signal of the engine temperature. That will activate an air bypass valve to slightly elevate the idle when the engine is cold. When the engine warms up, the valve will close completely.

Has anyone checked these?

Roy
Dec 23, 2017 at 4:41 AM
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CMASTALSKI
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  • 3 POSTS
I have not. Do you know where that is located at?
Dec 23, 2017 at 4:58 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
I attached a picture for you with the air regulator as well.

Roy
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Dec 23, 2017 at 5:06 AM
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CMASTALSKI
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Looks like fun. lol. Thanks for your help and have a Merry Christmas.
Dec 23, 2017 at 5:34 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
You are welcome. Same to you and yours.

Roy
Dec 23, 2017 at 5:36 AM
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