Chrysler Voyager 2000 GS Instruction page 28

25 - 28 EMISSION CONTROL SYSTEMS
DESCRIPTION AND OPERATION (Continued)
Fig. 3 EGR Mounting—3.3/3.8L Engines
1 – BACKPRESSURE TRANSDUCER
2 – EGR SOLENOID
3 – EGR VALVE
uum flows through the transducer to operate the
EGR valve.
De-energizing the solenoid, but not fully closing the
transducer bleed hole (because of low back-pressure),
varies the strength of vacuum applied to the EGR
valve. Varying the strength of the vacuum changes
the amount of EGR supplied to the engine. This pro-
vides the correct amount of exhaust gas recirculation
for different operating conditions.
This system does not allow EGR at idle.
A failed or malfunctioning EGR system can cause
engine spark knock, sags or hesitation, rough idle,
engine stalling and increased emissions.
REMOVAL AND INSTALLATION
EGR VALVE SERVICE—3.0L ENGINES
The EGR valve and Electrical EGR Transducer are
serviced as an assembly.
REMOVAL
(1) Disconnect the electric and vacuum connectors
from the electric EGR transducer (Fig. 5).
(2) Remove EGR valve mounting bolts.
(3) Clean all gasket surfaces and discard old gas-
kets. Check for any signs of leakage or cracked sur-
faces. Repair or replace as necessary.
Fig. 4 Electric EGR Transducer
1 – DIAPHRAGM
2 – PISTON
3 – SPRING
4 – EGR VALVE ASSEMBLY
5 – VACUUM MOTOR
6 – VACUUM MOTOR FITTING
7 – VACUUM OUTLET FITTING TO EGR VALVE
8 – EGR VALVE CONTROL ASSEMBLY
9 – ELECTRIC SOLENOID PORTION OF VALVE CONTROL
10 – VACUUM INLET FITTING FROM ENGINE
11 – BACK-PRESSURE HOSE
12 – TRANSDUCER PORTION OF VALVE CONTROL
13 – ELECTRICAL CONNECTION POINT
14 – EGR VALVE BACK-PRESSURE FITTING
15 – EXHAUST GAS INLET
16 – STEM PROTECTOR AND BUSHING
17 – BASE
18 – MOVEMENT INDICATOR
19 – POPPET VALVE
20 – SEAT
21 – EXHAUST GAS OUTLET
INSTALLATION
(1) Install EGR valve and new gasket on intake
manifold. Tighten mounting bolts to 22 N·m (200 in.
lbs.) torque.
(2) Connect the electrical and vacuum connectors
to the electric EGR transducer.
NS