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91 Chevy 4.3 running rich WHEN WARM UP?

Anonymous

∙ 10y ago

Updated: 9/13/2023

If the oxygen sensors for the 1991 Chevy 4.3 is running rich when it is warmed up it is best to have the sensors replaced. Once the sensors are replaced this should resolve the issue.

Wiki User

∙ 10y ago

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