New Topics › Forums › General Discussion › 2004 – 2009 Nissan Quest › Nissan Quest – 2004 – Code P0306 – Location of Cylinder 6 › Reply To: Nissan Quest – 2004 – Code P0306 – Location of Cylinder 6
Ha, I went right past the part where you said you swapped cyl 4 and 6. Since your plug shows something abnormal, check the rest of them, at least the ones you can get to easily. How’s the condition of the engine? Have there been many things done to it? Is it down on power? Next thing to check is whether you have a head gasket issue. Is the car overheating? A misfire can be caused by coolant leaking into the cylinder. You can check it with a radiator pressure tester. Just get a loaner tool from autozone with the radiator cap adaptor. Check youtube videos for how to use it. Pressurize the radiator to 16-18psi and see how fast it goes down. It should not lose pressure at all after 5 minutes. If it does you have a head gasket issue. If radiator pressure is good then check cylinder compression. Check youtube Eric the car guy and several others like Scottie Kilmer and realfixesrealfast. Autozone or advance also has the compression tester as a loaner tool.