Mitsubishi Eclipse Technical Information Manual page 71

Operation
The EGR system consists of a vacuum solenoid,
back pressure transducer and a vacuum operated
valve. When activated, the solenoid allows vacuum
to flow to the transducer. Negative exhaust back-
pressure allows manifold vacuum from the solenoid
to vent to atmosphere. Positive exhaust backpres-
An EGR system stuck in the closed position prevents
the system from decreasing NOx emissions. A sys-
tern stuck in the open position can increase hydro-
ENGINE <NON-TURBO> - Control System
sure causes the transducer diaphragm to modulate.
This allows intake manifold vacuum to reach the L)
EGR valve. The combination of vacuum on one
side of the valve diaphragm and exhaust back pres-
sure on the other allows exhaust gases to be
introduced into the intake manifold.
EGR valve
carbon emissions, fuel consumption, and produce
rough engine operation.
transducer