1992 Nissan Sentra Smog Test

Engine Performance problem
1992 Nissan Sentra 4 cyl Two Wheel Drive Manual

I didn't pass smog. Timing is 15 BTDC (it should be 10 BTDC).
RPM=1891 HC MAX = 130 HC MEAS = 129
CO% MAX= .80 CO% MEAs=.29
NO MAX = 835 NO MEAS=1496

RPM=2020 HC MAX = 105 HC MEAS = 38
CO% MAX= .69 CO% MEAs=.08
NO MAX = 774 NO MEAS=1021

Will adjusting the timing correct the high NO reading?
Everything else PASSED ok, incl the CATALYTIC CONVERTER.
Thanks