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Dave Plowman (News) Dave Plowman (News) is offline
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Default Automotive emission controls

In article .com,
Beloved Leader wrote:
Hydrocarbons. The last test, yesterday, I missed by 4 ppm at 15mph. The
limit is 55 ppm, and I came in at 59 ppm. Everything else passed. CO %
and NO ppm are great.


When you say great - are they better than maker's spec? High HC low CO
suggest a weak mixture, so possibly an air leak in the induction system
or engine breathers?

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