Reply to "Unburnt Fuel Smell"

rene4406Member

I was able to get an AFR of 14.5 at idle with my Holley 750 cfm #9379 (4150 dual mechanical secondary pump) by drilling a 0.1" hole in each butterfly. The idle richness screws are open about 1/2 to 3/4 turn and are very sensitive.

In France, pollution control is compulsory for vehicles put into circulation from October 1, 1972. My #4406 was built in September 1972 and therefore necessarily put into circulation (date of first title) in the US later but I managed to get September written on the documents..... nod

3/7/243:10 PM

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