| Subject: | Rough Idle With Misfire counts On Random Cylinders |
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Brand: |
Model: |
Model Year: |
VIN: |
Engine: |
Transmission: | ||
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from |
to |
from |
to | ||||
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Chevrolet |
Corvette |
2020-2021 |
All |
All |
6.2L LT2 |
All |
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Involved Region or Country |
North America |
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Condition |
A Low mileage vehicle (like PDI) May have a concern with a rough idle and misfires counting on random cylinders. |
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Cause |
This could be caused by marshalling the vehicle around and/or short runtimes soot fouling the spark plugs. |
If this is encountered, use GDS to command the engine speed up to 2000 rpm for 10 minutes and evaluate the concern.
If the misfires stop counting, return the vehicle to the customer.
If the concern is not completely gone, the vehicle may need to be driven to finish cleaning the spark plugs.
If the above does not resolve the concern and the sparkplugs are fouled preform the following.
If a sparkplug needs to be replaced to fully correct the concern, it is recommended to replace all 8 sparkplugs,
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Version |
3 |
|
Modified |
03/11/2020 - Created on. 04/08/2020 - Updated Correction. 02/15/2021 - Added 2021 MY |
Article ID: 1491
Created: February 16, 2021
Last Updated: February 16, 2021
Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article/2020-2021-corvette-service-bulletin-pip5715b-rough-idle-with-misfire-counts-on-random-cylinders-feb-15-2021-1491.html