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knocking under load

  1. knocking under load (under hood)

    NG900 & OG9-3 Workshop
    driving one day & felt something pop, then loud knocking noise. stopped car and got out with engine running - in neutral - and no noise. Can rev engine in neutral and no knock that i can hear. Drove the car 80 miles when i moved and performance was not affected, but the faster i go the more the...