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Old 04-19-2013, 04:33 PM   #10 (permalink)
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Join Date: Jul 2012
Location: camden, MI
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MC SBX - '95 Chevrolet Monte Carlo LS
Last 3: 29.75 mpg (US)
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EGR isn't likely to be an issue or contributor for this problem.... most engines these days don't have EGR valves, instead VVT is used to change cam timing around so that when the piston starts it's downward motion for the intake stroke, the exhaust valve is left open enough to draw in exhaust gasses with the fresh air charge, essentially an internal EGR mechanism.
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