Did emissions test today, and thought I'd post all the readings from the past 15 years. Passed idle with flying colors. They failed me on the gas cap again (3rd time). So I bought another new gas cap (stant 10810). checker still doesn't have the correct listing for a 90 RRC. They have the plastic screw in type listed.
Hydrocarbons (in ppm) Allowable: 220
Carbon Monoxide (in %) Allowable: 1.2
05
hc 62
co .39
06 (plugs/wires/air cleaner, lifters )118,000mi
hc 89
co .41
07
hc 62
co .39
08
hc 89
co .41
09
hc 73
co .46
10 (new plugs/air filter) 134,000mi
hc 66
co .26
11 137,200mi
hc 61
co .29
12 142,000mi new thermostat and I banged the dirt out of the air filter.
hc 85
co .66
13 146,000. new plugs, cap and rotor.
hc 40
co .39
14 149,000. Radiator rodded.
HC 150
CO 1.09
15 151,000. Upper end rebuilt. New injectors, fuel regulator, water pump, plugs, wires, cap & rotor.
HC 70
CO .39
16 156,000 no changes
HC 139
CO .39
17 159,000 oil change
HC 70
CO .45
18 163,000 no changes
HC 188
CO .80
19 166,000 Ignition Amp, fuel pump, oil change
HC 117
CO .47
20 168,500 no changes
HC 135
CO .91
21 171.086 No changes (not even knocking the dirt out of the air filter)
HC 123
CO .69
Somewhere in there I replaced the Cats. might have been before 2008 test.