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Old 08-19-2004, 08:02 PM   #4
68 Suburban
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Join Date: Oct 2000
Location: From Chicago, Live in Phoenix, AZ
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Quote:
Originally Posted by walker
As far as I know the more you advance your timing the higher your emissions, although I can't remember for sure if it is HC or CO that goes up. If you don't pas the sniffer test then reset your timing to about 6* btdc or so.
?
So I guess running the vacuum advance off the full ported port on the carb could increase emissions?
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