What do the code mean on my failed emission test? I have new muffler and exhaus on 1990 Mazda B2200

on 25/25 test HC PP Reading 505 allowed is 223 Co% Reading 12.22 allowed is 2.79 On 50/15 test HC Pp Reading is 389 allowed is 228 Co% reading is 11.86 allowed is 2.06 Can you tell me what I need to repair? Is it the catalytic converter?

by in Locust Grove, GA on June 22, 2013
1 answer
ANSWER by on June 04, 2014
you can try retarding your timing

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