Originally Posted by Rasim
i think the same but how can fire go through catalyzers ?
and why it goes rich i put Sl 55 intake and 178 mm pulley and no tune or fuel map optimazed, i should not go rich. may it be my spark plugs that have 100 000 miles on it?
The catalytic converters literally burn off excess hydrocarbons.
The fire does not go through the catalytic converters. The fire starts from the catalytic converters. Given enough fuel, the catalytic converters will ignite the unburnt fuel.