high nox wont pass emissions

TopSpeed2130 · 06-03-2005, 12:14 AM

have a 93 626 2.0liter MT tried 3 times and failed nox every time
besides the o2 sensor and egr what else can i do to make it pass already
gave it a full tune up put that fuel injector crap in and it still fails by like 80 points runs like it is brand new please help

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