aintwaven

02 Altima 3.5 100,000 mi.
Wife's reports car is running real ruff and strong gas smoke from tail pipe. I checked the codes and the only one, was for misfire cylinder #4. I decided because of mileage to replace all plugs. Back middle #3 spark plug tube was half full of oil, so I diluted and blew tube clear. The only way to replace rocker cover spark plug tube seals was to replace rocker cover, and since I was 60 mi from dealer I used permatex silicone hi temp to try to seal tubes. Put it all back together and had the same problem. Replaced coilpac on #4 no help. I ran it with new plugs and new coilpac #4. Pulled 2-4-6 plugs, 2 and 6 looked discolored(working) #4 looked spotless new. So still no fire I guess. When started, I cannot overstate how strong the raw gas smell is in the exhaust. Any help would be greatly appreciated. I will have to trailer to dealer and would love to avoid them if possible.

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