Lowering the HC ppm on your 1984 Honda Accord will depend on why the HC ppm
was high during the smog check. Was it high because of bad ignition spark,
lack of fuel, too much fuel, low compression? There are many problems which
would cause your Honda Accord to produce high HC. The most common is
ignition timing, spark plugs, spark plug wires, but again without knowing
the rest of the emission numbers such as CO and No, there is no way to
determine what's causing your Honda's high HC. We recommend having a smog
check repair station perform a hands on diagnose. In the mean time if you
want to have one of our smog technicians look over your Honda's failed smog
check repaort follow this link:
http://www.smogtips.com/smog_evaluations.cfm
