
Originally Posted by
DroppedMitsu
As long as it was taken decent care of these motors are barely broken in at 100k and should pass no problem. My guess is you need to do a little tlc to it, maybe new plugs and wires, new o2 sensor, etc.. Also pull off and clean out your EGR valve.
Things that cause high HC(hydrocarbons-unburnt gas) are vacuum leaks, defective cat, bad air injection parts(EGR and the like),defective ignition components/incorrect timing.
High CO(carbon monoxides):dirty air filter, faulty o2 sensor, bad/dirty maf, bad/incorrectly adjusted tps, bad engine coolant sensor.
These should get you on your way to getting it to pass smog. My old 2.0l would pass smog and it has over 200k on it never rebuilt, just gotta do proper maintenance.
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