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How could this be possible?

Discussion in 'General Tech and Maintenance' started by Shock_whore, Jul 6, 2007.

  1. Shock_whore

    Shock_whore New Member

    Likes Received:
    Jun 27, 2007
    Before 2nd O2 sensor and stock air box installed: (had a short ram intake)

    Failed HC 1.4 >>>>> limit .6
    Failed CO 16.8>>>>>limit 10.00
    Passed NOx 1.03 >>>limit 1.5

    After 2nd O2 sensor+stock airbox installed: (bastards won't test my car cuz of the short ram intake)

    Failed HC 1.3
    Failed CO 13.55
    Failed NOx 2.08

    HC and CO seem to dropped a bit, but NOx almost doubled.

    Did research and the cause of failure for HC + CO is most likely because the car is running too RICH. Too advanced of a timing and ignition related.

    NOx = High combustion temperature + running too LEAN

    How could this be? Running too RICH + too LEAN @ the same time isn't possible... CAT should be working fine. Got it put in a couple months ago.

    Anyone know where the EGR valve is located on a B16a2? Thanks!
    Last edited: Jul 7, 2007
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