Trooper (4 Door) V6-3165cc 3.2L DOHC (6VD1) (1992)
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EGR Backpressure Transducer: Description and Operation
Back Pressure Transducer
PURPOSE
Uses exhaust pressure to regulate the vacuum signal to the EGR valve.
LOCATION
On the common chamber.
OPERATION
When the exhaust pressure is low, the transducer opens a small air bleed passage allowing some air into the vacuum circuit. This reduces the
vacuum signal to the EGR valve and the valve closes slightly. If the exhaust pressure is very low the EGR valve will close completely. When
exhaust pressure is high, the air bleed passage is closed and control vacuum is directly applied to the EGR valve diaphragm.
