I passed yesterday but not by much HC are still high

the only things I did was short the R16/1 resistor and plug the vacuum line. I did try to run it hard on the freeway before the test but then had do drive at slower speeds for a bout a mile or so after getting off the freeway. The car sat running for about 5 minutes at the smog test station while the tech filled out the paperwork and entered the info into the computer before he started the test.

here are the results, the values in () are the retest values when I passed. Interesting takeaway that the HC came down the least compared to CO and NO

15 mph results 1772 rpm
%CO2 13.9 (13.8)
%O2 1.6 (1.5)

HC
111 failed max is 110 (95) 14% lower

CO
.19 passed (.14) 26% lower

NO
403 passed (323) 20% lower


25 mph results 1770 rpm
%CO2 13.8 (13.8)
%O2 1.5 (1.5)

HC
73 passed max is 77 (64) about 12% lower

CO
.16 (.15)

NO
239 (189) about 21% lower


so HC are still high, two years ago I put in a new cap and rotor, plug wires and plugs. I don't drive this car much a few k miles a year.

I think the high HCs are caused by a lean misfire due to a vacuum leak where the intake manifold attaches to the head. Not sure how hard the gasket is to change.

I am going to look at my results from 2 years ago and see what my HCs were