Hello all, Happy Easter. I am new here and looking for some assistance on our 05 Envoy XL with the V-8. I am getting a code of a mis-fire on the #1 Cylinder. Already replaced the coil pack with another one. Still no luck. Pulled the plug and holy cow talk about god awfull lookin wow these plugs (all 8 & wires) were just replaced with OEM last year. This one looks like it has been in there for 500,000 miles dragged thru the mud, doused in gasoline then set on fire and left in the rain to rust. Well I cleaned it all up and found what appears to be a crack all the way around the procilian on the tip end of the plug. Could this be my mis-fire ?
Thank you for your time.
Thank you for your time.