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Old Dec 29, 2015 | 10:20 AM
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Default Engine idle
Do any of you feel that the engine idle is slightly rough?
I have a 2016 Z51(all stock)
P.S. My daily driver is a Volt so its probably my imagination.
Last edited by C8-Vette; Dec 29, 2015 at 10:35 AM.
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Old Dec 29, 2015 | 10:35 AM
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Lumpy idle is completely normal.
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Old Dec 29, 2015 | 10:37 AM
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Yep - normal, especially at cold start up. Smooth's out a bit when warm, but still normal. I like it that way. High performance engine - bit of a cammed up idle. That's a good thing!
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Old Dec 29, 2015 | 11:05 AM
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Thanks for your responses. I recall my C6 was about the same.
Last edited by C8-Vette; Dec 29, 2015 at 11:05 AM.
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Old Dec 29, 2015 | 11:26 AM
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Yep normal. Nature of the beast - and I love it!
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Old Dec 29, 2015 | 06:56 PM
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Probably running on 4 cylinders. You think
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Old Dec 29, 2015 | 07:27 PM
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Never idles on 4, only under load.

It's the same cam as the escalade L86 6.2 liter. Probably the least aggressive cam GM has used in a sports car.
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Old Dec 29, 2015 | 08:46 PM
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Has anyone noticed a knocking sound at idle? My fist Vette so not sure if its normal...
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Old Dec 29, 2015 | 09:00 PM
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There is a TSB out on this issue.


http://www.corvetteactioncenter.com/...ation-989.html
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Old Dec 29, 2015 | 09:04 PM
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Originally Posted by mechengr1
Has anyone noticed a knocking sound at idle? My fist Vette so not sure if its normal...
Go have it checked might be as little as the mount needs adjustment or you could be hearing the injectors clicking.
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Old Dec 29, 2015 | 09:11 PM
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Originally Posted by bob guzzy
Go have it checked might be as little as the mount needs adjustment or you could be hearing the injectors clicking.
Yep, if it sounds like a sewing machine, it's normal DI sound.
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Old Dec 29, 2015 | 09:52 PM
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Yup, sounds like a sewing machine...
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Old Dec 29, 2015 | 10:37 PM
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It's from the pump, not injectors.
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Old Dec 29, 2015 | 11:02 PM
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Originally Posted by BladeSilver2015
That's dated October 2014. I would assume any cars built after that date would have the "fix" done on the assembly line.
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