Emissions help

[dye_kapp]

I barely failed my smog test this morning on the 15 mph run. I was allowed something like 1050ppm for NOx and emitted 1070ppm. Does anybody know how I could lower these just a little bit to get me by? I heard its from my combustion chambers getting too hot? Should I try testing it early in the morning when the air is cooler? I live in So Cal. Any suggestions?

 

[Lump1713]

I barely failed my smog test this morning on the 15 mph run. I was allowed something like 1050ppm for NOx and emitted 1070ppm. Does anybody know how I could lower these just a little bit to get me by? I heard its from my combustion chambers getting too hot? Should I try testing it early in the morning when the air is cooler? I live in So Cal. Any suggestions?

have you given your truck a tune up in awhile? if not give it one like plugs and wires should do...