Cougar/XR7 V8-302 5.0L (1983)
EGR Valve: Description and Operation
In this system the exhaust gases are metered through the EGR valve to a passage in the carburetor spacer thereby diluting the air fuel mixture
entering the combustion chambers. Dilution of the incoming mixture lowers peak flame temperatures during combustion and thus limits the
formation of nitrogen oxides (NOx).
Fig. 38 Spacer entry EGR connection. 8 cyl. engines
Eight cylinder engines use the ``Spacer Entry'' EGR System which has the EGR valve mounted on the rear of the carburetor spacer, Fig. 38.
The exhaust gases are taken from a drilled passage in the exhaust crossover of the intake manifold. The exhaust gas is then routed through a
metered EGR valve to a passage in the carburetor spacer and fed into the primary bore.
