My honda passport keeps throwing codes. First it threw a code P0302. then we looked in the 2nd cylinder, and found oil in the spark plugs so we changed the valve cover gasket and the spark plug tube seals. Now its throwing a code P0306, which is the missfire of the 6th cylinder, but we checked it and it looked fine. What else could it be?
What do i need to do if my car throws a code P0306?
The engine code PO306 is a detected misfire in cylinder 6.
It could be a fouled plug or bad plug wire or coil pack.
Start with #6 cylinder %26amp; consider new plugs %26amp; then wires as well as the coil to #6
Do a compression test while you have the plugs out on each cylinder.
Reply:Oil in the spark plugs Im assuming you're talking about the inside. Not a good sign, this shows the valve guides/seals are worn out. If it's out it's could be a valve cover gasket which u can live with. Whenever you replace spark plugs is good to replace them all. If you have a distributor, replace the cap and the rotor. This is a basic tune up
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