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Chevy Silverado misfire

Fix Chevy Silverado misfire

Some Chevy Silverado owners with the 4.8L may encounter an intermittent P0300 misfire trouble code, along with excessive emissions, poor idle quality, hesitation, and stalling. You would normally start by checking your Chevy Silverado fuel trim with a scan tool. But several shops report problems with an intermittent and corroded ground connection that can cause all these problems on the 4.8L engine. The misfire condition may appear during turns or any time the engine moves in it’s mounts. So before checking all the usual suspect like fuel pressure, exhaust restrictions, spark plug condition, check the condition of the ground wire termination point from the IGN coil. Ground #102 is located at the lower left front of the engine block. Remove the ground cable and clean the connection.

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Chevy Silverado, Chevy Silverado misfire, Chevy Silverado P0300

Chevy Silverado ground #102 location



Posted on by Rick Muscoplat

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