agu7

John, I did replace both sets of gaskets at the same time. I swap the injectors as well, erase the code and keep giving me the same reading "cylinder 4 misfire". I'm going to check the compression now.

I been using seafoam for long time, and now, after the 75, 000 I use the high mileage seafoam every 10,000 miles in all 4 cars. I will get another can, and will keep you guys posted. Thanks again.

I have a 2015 Journey Crossroad 3.6L with 94,000 miles, an a code P0304 cylinder 4 misfire. After doing all things mention below, the engine runs smother and it fills with more power....however, when I start the engine or while I'm at a stop light the RPM's are between 500-600 too low. And the Scanner still reading the same code. What I have done to correct the issue with no luck? - I swap coils 4 and 2 - replaced all 6 coil-on-plug insulator boots with new ones - replace spark plug #4 with new one - cleaned all fuel injectors (I removed the injectors and cleaned them with a wire brush, and also connected a cleaning line tool with the straw to the fuel line and a carb cleaner) - cleaned O2 sensors Note: At 90,000 miles (3 months ago) I replaced the oil/cooling filter housing with gaskets, replaced oil & filter, replaced all spark plugs and the pcv valve. I can't find any air leaks... Any recommendations? Thanks in advance