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tjts1 · 04-28-2008, 12:14 AM

After blocking off the EGR pipe at the intake manifold on an 89 volvo fuel economy improved by 2mpg on average over many many tanks. Maybe EGR on newer cars is effective but most older systems are carbage.

04-28-2008, 12:14 AM	#14 (permalink)
tjts1 Banned Join Date: Feb 2008 Location: california Posts: 1,329 Thanks: 24 Thanked 161 Times in 107 Posts	After blocking off the EGR pipe at the intake manifold on an 89 volvo fuel economy improved by 2mpg on average over many many tanks. Maybe EGR on newer cars is effective but most older systems are carbage.