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2002 Nissan Maxima Question: I change my spark plug I had a DTC P0306 the rear plug on the left side had oil

 

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Rev searl, Lancaster, TX, August 28, 2011, 17:27
 Rookie

the same code come up and the car is still running the same do i need to replace that coil boot or is that a major problem

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    August 28, 2011, 17:32
     Master

    The oil you see is because the seal that seals the valve cover is leaking. You need to replace the valve cover gaskets with the spark plug seals in the valve cover gasket set. If you don't replace it soon you will also have to replace at least number six coil.

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    Rev searl, August 28, 2011, 17:40
     Rookie

    if i change the valve cover gasket will this solve my problem with the way the car is running and the boot was lose around # 6 plug

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    backyard tech, August 28, 2011, 18:50
     Master

    The oil is taking the spark to ground hence causing a misfire. If you can just purchase the coil boot then buy it. First you have to eliminate the oil leak. Once you stop the oil leak you should be able to clean off the oil on the boot and it should be fine.

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  • Answer #2

    August 29, 2011, 04:51
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     Journeyman

    If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

    If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone badIf there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

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