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

L98 Engine Vibration When Turning Off

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Old Jun 6, 2016 | 12:18 PM
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noahkim205
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Default L98 Engine Vibration When Turning Off

Hello!

I'm concerned about my Corvette that vibrates for up to 3 seconds when the engine gets turned off. Before that the rpm goes up to 1.7 (17/100) when the gear is parked or staying on neutral.

Some people say it's the mounts issues. Is it right? How do I replace them? Will it be a easy task for me to replace them?

Let me know, will be greatly appreciated!!!!!!!!!!!

Thank you,
Noah

Last edited by noahkim205; Jun 6, 2016 at 12:19 PM.
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Old Jun 6, 2016 | 12:52 PM
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Hmmm ... That's a new one.

It does sound like motor mount issue. It will not be easy to replace them.
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Old Jun 6, 2016 | 01:18 PM
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Do you mean run-on? Go find a vid on youtube if you don't know what I mean.
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Old Jun 6, 2016 | 02:06 PM
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Originally Posted by BOOT77
Do you mean run-on? Go find a vid on youtube if you don't know what I mean.
Yes, it acts like it wants to die with some last deep breaths
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Old Jun 6, 2016 | 02:36 PM
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Your prob running too low octane fuel, these cars need premium octane.
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Old Jun 6, 2016 | 03:14 PM
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Originally Posted by BOOT77
Your prob running too low octane fuel, these cars need premium octane.
Issues solved... thank you
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