Are these emissions feasible?

200SX 1809cc turbo 1993/4 108K miles CO 0.018% HC 9ppm

Seems way lower than any other result I've had in the past. I'd have expected a CO around 0.5-1% and HC 100-200 ppm. I think it may have been sniffing fresh air (or what passes for fresh air in a MOT test station).

1st test I got CO 7.083% (limit 3.5%) HC 312ppm

The Lambda sensor had failed. I fitted a 100K mile / 10 year old one from a scrap car and hoovered the Apexi twin cone filter.

last year was 0.881% CO, 175ppm HC

Reply to
Peter Hill
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