I have been asked about emissions on an 89 VDP and need some
advice. The car was tested on a chassis dynomometer and scored
well except for NOx, which was slightly high. Numbers were 0.2441
grams per mile Hydrocarbons, (allowed 1.4000), 4.676 grams per mile
CO (allowed 30) and 2.6949 grams per mile NOx (allowed 2.5).
The car was never fitted with an air pump. I’ve checked all the
hoses and intake manifold bolts, all are tight. The car has about
95,000 miles on it.
What is the most probably cause for the high NOx? Oxygen sensor?
I hate to just start thowing parts at it without a plan. If anyone
has had a similar situation, I’d appreciate knowing how it was
corrected. Thanks in advance.–
Pete 70 XKE (193K) 88 XJ6 (233K) 88 XJ6 (217K) 60 Mini
Severna park, Maryland, United States
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