emissions test?

1 ⤊

My car failed the NOx part of the emissions test in New York City. The limit is 2.00 gpm and my car recorded a 2.35 gpm. The CO and HC pertions of the test passed quite easily.
Is this something a tune up would cure.
My car is a 1987 Chevy Caprice with a 4.3 v6.
I'm going to change the oil, plugs, air filter tomorrow. Hopefully it will pass on Monday.

2007-03-10 17:52:47 · 2 answers · asked by glenn s 2 in Cars & Transportation ➔ Maintenance & Repairs

2 answers

usual causes of this are:
1 EGR.
2 Engine temp high.

check function of EGR also EGR passage's my be restricted.
check cooling system.

2007-03-10 20:10:27 · answer #1 · answered by Sundew 4 · 1⤊ 0⤋

i dont no

2007-03-10 18:05:42 · answer #2 · answered by Raymond B 4 · 0⤊ 3⤋