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clogged cat

  1. Check out these O2 sensors (one exploded)

    2002-2006 Nissan Altima Discussion (2.5 & 3.5)
    (Downstream on left, upstream on right has been cleaned up already) On a long drive in my wife’s 2003 Altima 2.5, the car started bogging way down. I had just fixed a misfire that had been caused by a leaky valve cover allowing oil into the spark plug tube for cyl 2, but the car had been driven...