car is a 1985 accord with carb. Ok so my co and mo and co2 levels are all great. but the Hydrocarbons are killing me. first run through was 1178hc with a 220hc limit. so bad fail, I've dropped it down to 520 but still need to get that other 300. any advice??? I think the idle is a little rich where is the adjustment screw for the carb?? I've already tryed ISO heet and steel wool. other than that I'm at a loss. cant find that mixture screw.

Is that a 3bbl carb??