Rough idle/P0305 cylinder 5 misfire

New Topics Forums General Discussion 1999 – 2002 Nissan Quest Rough idle/P0305 cylinder 5 misfire

This topic contains 4 replies, has 2 voices, and was last updated by  prgonzalez 4 months, 4 weeks ago.

Viewing 5 posts - 1 through 5 (of 5 total)
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  • #12371

    jgoods06
    Participant

    Driving home today I felt a loss of power and Service Engine Soon lights started flashing. Put on code reader and have me usual Knock Sensor code and Cylinder 5 misfire. Checked wire and it has spark and spark plug looked ok. I replaced spark plug for a quick fix but no luck. Still idling bad and weak acceleration with engine flashing intermittently. Any thoughts of what to look into?

    #12381

    prgonzalez
    Participant

    jgoods,

    Do not worry about the knock sensor. For the misfire, can you check the total resistance of the spark plug cables including the distributor cover? If the resistance is too high your spark will be weak or inconsistent.

    Check their total resistance with an ohm-meter. From the connector to the internal post in the distributor cover.

    Cyl 1 6.5K ohm max
    Cyl 2 10.0K ohm max
    Cyl 3 8.5K ohm max
    Cyl 4 12.5k ohm max
    Cyl 5 8.5k phm max
    Cyl 6 11.0k ohm max

    If they are over those max values or too close, replace with a new set of wires and a new distributor cap and rotor. Use prestolite brand. That is one of the original brands used by Nissan on these engines. I bought my current set at http://www.partsgeek.com for about $66.00.

    If the resistance is way bellow the limits, you could have an injector problem. I would run injector cleaner first, use one that is safe for oxygen sensors.

    Lastly, as a worst case, you could have a wiring problem to the injector or a damaged computer output to the cylinder 5 injector.

    Pedro

    • This reply was modified 4 months, 4 weeks ago by  prgonzalez.
    #12401

    jgoods06
    Participant

    Thx for reply. Going to pick up wires now

    #12411

    jgoods06
    Participant

    Running great! As always thanks again Pedro. You are s savior!

    #12421

    prgonzalez
    Participant

    You are welcome!!!

    I love these vans, they are so predictable with the failures most of the time.

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