I got an '87 Nissan Sentra 1.6L CA emissions with feedback carburetor and 89780 miles on the clock in yesterday for a smog test- it failed NOx at 15mph and gross polluted NOx at 25mph. All the numbers are as follows:

15mph

CO2- 14.3%; O2- 0.4%; HC- 6ppm; C... Login to read more.