C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Faster idle

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Old May 15, 2015 | 11:22 PM
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Default Faster idle

Is the only way to get faster idle to change the idle rpm settings in the chip?
I have no vacuum leaks and I have replaced almost all sensors and made proper adjustments and settings, but car just idles to low after warmed up
Other than that, it runs great
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Old May 16, 2015 | 02:46 AM
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Do a minimum idle adjustment:

https://www.corvetteforum.com/forums...post1570563689
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Old May 16, 2015 | 08:16 AM
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i'd check the timing too
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Old May 16, 2015 | 12:29 PM
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It has all been done
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Old May 16, 2015 | 01:25 PM
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Originally Posted by mlm0
Is the only way to get faster idle to change the idle rpm settings in the chip?
No matter what you do mechanically it will always try to idle at the programmed idle rpm.

You could disconnect the IAC and adjust the throttle stop, but the check engine light will come on and it may or may not stall when putting it in gear, running the a/c, etc.

Last edited by 8a8mfh; May 16, 2015 at 01:28 PM.
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Old May 16, 2015 | 02:31 PM
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That's what I though also. I have new chip with faster idle setting I will install today. Just for my own knowledge, if you have vacuum leak, won't that cause a faster idle and not a slower idle
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Old May 16, 2015 | 04:04 PM
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Originally Posted by mlm0
That's what I though also. I have new chip with faster idle setting I will install today. Just for my own knowledge, if you have vacuum leak, won't that cause a faster idle and not a slower idle
Yes, a vacuum leak usually causes a high idle.
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Old May 16, 2015 | 05:20 PM
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Thanks
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