westf27
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| posted on 4/6/10 at 12:50 PM |
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pinto engine emissions
car passed mot yesterday( Pinto 2.0)on carbs.Noticed co level was 2.5% (4.5% allowed) and 275ppm HC (1200 allowed) can anyone tell me if my engine is
running weak/rich and explain the relationship between co/hc
555
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jollygreengiant
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| posted on 4/6/10 at 01:58 PM |
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co level reflects how rich you engine is running and the HC level reflects how healthily it is running.
Pinto engines will run healthily with the CO level between 0.5% and 4.5% (the lower the figure, the weaker it is running and the higher it is, the
richer it is running) but the ideal level for a car engine is usually about 2.5%.
HC or Hydro-Carbon level is a measure of what unburnt fuels or oils there are in the exhaust, thus telling you how healthily your engine is burning
the incoming fuel mixture. A high reading can reflect an airleak or excessive oil consumption and this needs to be assessed in conjunction with the
CO level but a again a pinto engine running on carb(s) I would expect the co level to be somewhere around the 300ppm mark (+/- 100ppm depending on age
of engine and carbs).
SO your figures are just about perfect for a carb engined vehicle that is not brand new but has probably got some where between 10 and 50k miles on
the clock.
hope this helps.
[Edited on 4/6/10 by jollygreengiant]
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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westf27
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| posted on 4/6/10 at 04:34 PM |
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excellent reply,thanks
steve
555
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