Mike,
High HC?
How may miles on your car?
What is your fuel economy (miles per gallon) like?
What test are you failing? Idle or at speed?
How high is really high?
Do you have the complete report and can you post the results for all of the gases that were measured O2, HC, NOx, CO, CO2
Do you have a miss fire? IF HC (unburned fuel) is high I would suspect a missfire. How old are your plug wires? Cap? Rotor?
It is also possible that the HC are coming from the crankcase through the PCV. When was your last oil change?
And finially don't forget that HC can come from too much valve over lap. Is you valve timing correct and is the valve lash set to the loose side of the spec.
A burnt valve could also cause high HC but you should see this in the compression test. Have you done a compression test?
A link for you viewing enjoyment.
http://www.visi.com/~rhayman/smog_fa...Catalyst%20Out
If you keep after the problem you will find the solution.
Good luck
Paul
89 535 230K (passed emissions with flying colors, wasn't even close, although I was worried when they added NOx to the test because my car has never had its NOx tested in its 15 year life until last month)