Lotus Elan

emissions

PostPost by: zeteclotus » Mon Jun 18, 2007 1:20 pm

When I went to the MOT the mot man put the car on the emissions machine out of interest we got:

1.25 CO which is good but a hydrocarbon reading of over 2000!! car runs and drives fine, explains the unique smell the exhaust has.

A modern cars hydrocarbon readings pass level is 30 apparently.

Any thoughts as to why its so high, I think thin oil and unburnt fuel plugs do not fowl up so I am not too worried.
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PostPost by: Dave-M » Mon Jun 18, 2007 2:48 pm

I think that if you remove the breather pipe (block to air box) and vent it to atmosphere, you will find your HC readings will be reduced.
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PostPost by: msd1107 » Mon Jun 18, 2007 4:55 pm

On my previous Elan, it was the valve guides.

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