emmisions question

[ghostrida3]

ok retarded timing, cleaned air intake, cleaned egr valve. got hc down to 85(132 allowed)
co.76(.72 allowed failed) nox still high but great reduction went from 2600s to 1275(945 allowed failed) any suggestions?

[JBizzlebone]

ok retarded timing, cleaned air intake, cleaned egr valve. got hc down to 85(132 allowed)
co.76(.72 allowed failed) nox still high but great reduction went from 2600s to 1275(945 allowed failed) any suggestions?

Those numbers indicate that your car is running lean. An imbalance in the fuel mixture will raise CO's and your engine running lean will increase your combustion temps(ie. NOx). I would recommend checking your fuel filter first.

If that doesn't do the trick you can check your O2 sensor, fuel pressure regulator, proper heat range on the spark plugs and gap, injectors, carbon build-up.

Like I said, check your fuel filter first and go from there.