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| V6 Idle Speed (Page 1/1) |
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FieroMark
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AUG 17, 04:51 PM
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Who can tell me what the idle speed should be on a V6 GT? Every video I see that shows the tach is indicating ~900 RPM. Mine is there also.
I would expect something around 600, but I understand the ECM controls this through the IAC valve, and it cannot be (lowered) in my case.
Is there a workaround to get it lower?
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Jason88Notchie
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AUG 17, 05:20 PM
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900 is perfect. I wouldn't mess with it.
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Patrick
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AUG 17, 05:26 PM
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Lower oil pressure (from a lowered idle speed) while idling with an older worn engine may not be a good idea.
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Vintage-Nut
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AUG 17, 06:05 PM
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| quote | FieroMark:
Who can tell me what the idle speed should be on a V6 GT? |
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If you had the "Vehicle Emission Control Information" sticker on the deck lid, it says:
"The idle speed is automatically controlled. Do Not Attempt Adjustments."
And yes, my operating temperature idle is around 800-900 RPM too.....
------------------
Original Owner of a Silver '88 GT
Under 'Production Refurbishment' @ 136k Miles[This message has been edited by Vintage-Nut (edited 08-19-2024).]
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pmbrunelle
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AUG 18, 08:14 AM
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The ECM’s idle RPM target can be changed by modifying its PROM.
How did you determine that 600 RPM was a good idle speed?
From my experimentation, the Fiero V6 will not run smoothly below 800.
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FieroMark
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AUG 19, 07:58 AM
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I had 600 RPM in my mind from the good 'ol SBC V-8 days. If 900 rpm is correct, I'm fine with that. Thanks!
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