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Jeep
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1987
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Comanche Base, 4.0 M, 4WD, Standard
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Repair and Diagnosis
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Engine Performance
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Testing & Diagnosis
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EGR System
EGR System
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Description
Operation
Notes
EGR Valve
Notes
EGR Valve W/O Integral Backpressure Sensor
EGR Valve W/Integral Backpressure Sensor
Coolant Temperature Override (CTO) Switch
Thermal Vacuum Switch (TVS)
EGR Dump Valve
Forward Delay Valve
Testing
EGR Valve
Valve Opening Test
Valve Closing Test
Coolant Temperature Override (CTO) Switch
Dump Valve
Thermal Vacuum Switch (TVS)