2007 Pontiac g6 4 cylinder, the third cylinder is not firing, new plugs, swapped plugs/coils packs, checked wiring and voltage, swapped fuel injectors, check wiring and voltage, problem stays with the cylinder, looked down into it and the head is slugged up and wet.

 

This is a forum dedicated to 1982 through 1992 Chevy Camaro and Pontiac Firebird cars only . Your best bet would be to find a forum that deals with your type of car and ask there . As a generalized statement I will say , "sludged up and wet" is not a good sign and I'll bet a compression check is gonna tell you all kinds of bad things about that sludgy cylinder .

Good Luck with it .......