Mechanics

#1 CYLINDER MIS FIRING

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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Ernie113
November 12, 2011.




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

Tiny
Rasmataz
Nov 12, 2011.


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