1 CYLINDER MIS FIRING

  • Tiny
  • ernie113
  • 2005 GMC Envoy
  • 102,000 miles

05 GMC Envoy 5.3L, P0301 code #1 cyl misfiring, 102,000 miles plugs replaced at 80,000miles, I have replaced coil and wires, still running rough at low rpms, any ideas?

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Saturday, November 12th, 2011 AT 9:54 PM

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  • Tiny
  • rasmataz
  • Member

Check the sparkplug, compression and injector for no.1 cylinder-start here

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Saturday, November 12th, 2011 AT 10:17 PM

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