Quote:
Originally Posted by SoguRacing
if your NOX reading is high then you're running lean not rich. NOX is the production of excess heat in the combustion chamber. a lean condition will cause the NOX number to be excessively high. If all your other numbers were fine, it's not the cat. Try retarding your timing a bit or getting a step colder plugs. this may help.
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Had the same problem.
new plugs and re-adjusting your timing should make it pass.