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XfireZ51 · 10-31-2011

Decel creates a vacuum in the exhaust which sucks fresh air into the exhaust if there is a leak. Any unburnt gases get ignited with the heat and oxygen mixture. DFCO eliminates the excess fuel. If you have popping on decel, you can reduce fuel in the CLOSED PORT Throttle VE table at the 20-25 kPa cells.

10-31-2011	#5
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: Backfires when shifting Decel creates a vacuum in the exhaust which sucks fresh air into the exhaust if there is a leak. Any unburnt gases get ignited with the heat and oxygen mixture. DFCO eliminates the excess fuel. If you have popping on decel, you can reduce fuel in the CLOSED PORT Throttle VE table at the 20-25 kPa cells.