Merkur Scorpio V6-179 2.9L (1989)
EGR Valve: Description and Operation
Fig. 1 EGR valve crossectional view
The EGR system is designed to reintroduce exhaust gas into the combustion cycle in order to lower combustion temperature and reduce the formation of
nitrous oxides. These vehicles use a ported EGR valve, Fig. 1, which is controlled by the EEC system through an EGR solenoid vacuum valve.
