1990 Mazda B2200 Q&A

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

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? -
Answer 1
you can try retarding your timing -