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RobertISaar · 03-08-2013, 08:14 AM

EGR isn't used primarily for leaning out the AFR... it's used to cut throttle losses(and reduce NoX), since when EGR is active, you need more throttle to maintain the same amount of output.

03-08-2013, 08:14 AM	#222 (permalink)
RobertISaar Master EcoModder Join Date: Jul 2012 Location: camden, MI Posts: 324 MC SBX - '95 Chevrolet Monte Carlo LS Last 3: 29.75 mpg (US) Thanks: 7 Thanked 55 Times in 46 Posts	EGR isn't used primarily for leaning out the AFR... it's used to cut throttle losses(and reduce NoX), since when EGR is active, you need more throttle to maintain the same amount of output. __________________