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You do know what NO stands for correct? Well if you do, then you should know what causes that and do all the things short of repairing the egr system. And unless you have a major egr problem you will lower you nox emissions
Here's a too list:
1.Make sure the engine doesn't over heat, cooling system functions
2.Make sure your catalytic converter is functioning.
3.Make sure the oxygen sensor is functioning correctly, or richen your mixture manually.
High combustion temps are usually responsible for high nox emissions. So to combat high nox, we lower the combustion temps with fuel, and the cat should help clean up the rest.
High mileage is usually, a new car excuse, xd!
There is a delicate balance, when messing with emissions. Add just enough, take away just enough etc.
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LoverTechnologies "Half Broken Things!"
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