my son has an '81 prelude that idles too low. for the life of me I cannot find the idle screw though I know what needs to be adjusted....I think....it looks like a dashpot on the driver's side of the carb....? if he holds the gas pedal down it idles fine but if he lets up it dies. I can post a pic if that would help. also retarding or advancing the distributor seems to make almost no difference in the idle....?