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  1. Thread: *Smog help!*

    by xj4life2
    Replies
    68
    Views
    12,028

    Re: *smog help!*

    I can not give a reason , technical at least but fancy plugs suck in the 4.o change to regular Champion plugs they run the best and are the factory replacement for the vehicle. Again replace the o2...
  2. Thread: *Smog help!*

    by xj4life2
    Replies
    68
    Views
    12,028

    Re: *smog help!*

    First of all my Renix had an egr on it . Secondly high NOX is caused by 3 things in this case 1. carbon build up on pistons due to bad o2 2.high temp, high pressure PVC orifice is clogged 3. bad cat....
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