Join Date: Feb 2006
Location: Washington State
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The EGR Or Exhaust Gas Recirculation system merely recycles a metered amount of exhaust gasses back into the intake manifold to reduce the Nitrates of Oxygen amounts. The EGR system also lowers the combustion temperatures and can reduce the engines tenancies to detonate. The EGR system only operates during the cruse cycle not during acceleration nor full throttle.
I tend to leave the EGR system on most of my engines as they really don't affect performance and keep the part throttle detonation down.
The lack of a functional EGR system can and will cause the MIL to light up on your dash, and cause the computer to over compensate and richen up causing the bad fuel econ.
1967 Mustang coupe, Mustang II front suspension. W/RV camed, D3VE headed, 460/C6 (soon to be 557 CID w/ported police interceptor heads) out of the box BBC headers(with homemade steel adapters)
Shocktower removal enthusiast.
The race is not over till the Fat Block Ford Sings!