Question about Chevrolet Silverado 2500HD

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Replaced plugs & wires. All plugs on left bank were covered in soot. Right was fine. Code read it. and codes came up. #1: Multiple misfire. #2. Burning lean. Erased the codes & they came up again after the new plugs & wires were installed. Can you point me in the right direction how to figure this problem out please?

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Actual codes would help more, but lean is usually a vacuum leak, possibly a dirty/bad MAP sensor (although that would be if you had lean both sides)-look for a leaking/broken vacuum line, or an intake manifold leak (use a can of carb cleaner and spray the top of the engine on the lean side).

Posted on Mar 23, 2011

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Posted on Jan 02, 2017

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