Damn Im getting tired of this crap. I try very hard to keep my vehicle running good and smog compliant. It is an 84 Blazer with a 350 with 5000 miles on it. Carb is a new edelbrock C.A.R.B. cert. It failed 2 weeks ago due to high hydrocarbons. Replaced plugs, wires reset the timing, oil is clean and the air filter is also clean.Again they are saying high hydrocarbons. Any ideas? It is not like I am driving a POS.