2003 Chevy Silverado ruff idle

Tiny
RUFF_RUNNER03
  • 2003 CHEVROLET SILVERADO

Engine Performance problem
2003 Chevy Silverado V8 Four Wheel Drive Automatic 106000 miles

03 chevy silverado. Getting an intermittent rough idle and has a mass air flow code as well as a 171 and 174 codes (lean condition) replaced the spark plugs/wires, mass air flow and fuel filter. Also tested the fuel pressure and came out ok, but still getting the rough idle. Runs great at any speed besides idle. Any thoughts?

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Friday, February 26th, 2010 AT 8:12 PM

1 Reply

Tiny
JACOBANDNICKOLAS
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The lean mixtures usually indicate a vacuum leak. Have you checked for leaks?

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Saturday, February 27th, 2010 AT 12:18 AM

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