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Old 01-15-2018, 12:27 AM   #3
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Join Date: Nov 2016
Location: Tulsa
Posts: 298
Re: 1998 vortec 5.7 bogs down on acceleration

The O2 sensor is mounted in the exhaust manifold to monitor how much unburned oxygen is in the exhaust as the exhaust exits the engine. Monitoring oxygen levels in the exhaust is a way of gauging the fuel mixture. It tells the computer if the fuel mixture is burning rich (less oxygen) or lean (more oxygen).
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