What is the purpose and operation of the EGR Vacuum Solenoid and EGR Valve on Chevrolet Caprice?

The system reduces exhaust-emitted nitrogen oxides by recirculating a portion of the exhaust gas. The EGR valve, on the intake manifold, is central to this system. Two EGR valve types exist: negative and positive backpressure. It's inactive at idle and during deceleration, controlled by a thermal vacuum switch. EGR issues can cause rough idling and performance. To inspect, ensure the diaphragm plate moves freely and observe engine speed changes when manually depressed. Examine vacuum lines for blockages. Test the thermal vacuum switch with a gauge, replacing if faulty. For EGR valve replacement, disconnect vacuum hose, remove, and install a new valve with a gasket. For the switch, drain coolant, remove, and install a new one.

Genuine Chevrolet Caprice EGR Vacuum Solenoid

EGR Valve Vacuum Solenoid

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10 EGR Vacuum Solenoids found

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Chevrolet Caprice Solenoid Assembly, Egr Control Valve Relay
Part Number: 1997173
Product Specifications
- Other Name: SOLENOID, Emission Control System; EGR Valve Solenoid, Solenoid
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1989-1993 Chevrolet Caprice | 4 DOOR, BROUGHAM 4 DOOR, CLASSIC 4 DOOR, CLASSIC LS 4 DOOR, CLASSIC STATION WAGON, STATION WAGON | 6 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L
View related parts
Chevrolet Caprice Solenoid Assembly, Egr Control Valve Relay
Part Number: 1997647
Product Specifications
- Other Name: VALVE
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1983 Chevrolet Caprice | 4 DOOR, CLASSIC 2 DOOR, CLASSIC 4 DOOR, CLASSIC STATION WAGON | 6 Cyl 3.8L
View related parts
Chevrolet Caprice Solenoid Asm,EGR Control Valve Relay
Part Number: 1997554
Product Specifications
- Other Name: SOLENOID, Emission Control System
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982 Chevrolet Caprice | 4 DOOR, CLASSIC 2 DOOR, CLASSIC 4 DOOR, CLASSIC STATION WAGON, STATION WAGON | 8 Cyl 5.0L
View related parts
Chevrolet Caprice Solenoid Asm,EGR Control Valve Relay
Part Number: 1997169
Product Specifications
- Other Name: SOLENOID, Emission Control System
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1988 Chevrolet Caprice | 4 DOOR, BROUGHAM 4 DOOR, CLASSIC 2 DOOR, CLASSIC 4 DOOR, CLASSIC STATION WAGON, STATION WAGON | 6 Cyl 3.8L, 6 Cyl 4.3L, 8 Cyl 5.0L
View related parts
Chevrolet Caprice Solenoid Assembly, Egr Control Valve Relay
Part Number: 1997223
Product Specifications
- Other Name: SOLENOID, Emission Control System; Solenoid, Vacuum Control Solenoid
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1996 Chevrolet Caprice | CLASSIC 4 DOOR, CLASSIC STATION WAGON, LS 4 DOOR | 8 Cyl 4.3L, 8 Cyl 5.7L
View related parts
Chevrolet Caprice Solenoid Assembly, Egr Control Valve Relay
Part Number: 1997161
Product Specifications
- Other Name: SOLENOID, Emission Control System
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1988 Chevrolet Caprice | 4 DOOR, BROUGHAM 4 DOOR, CLASSIC 2 DOOR, CLASSIC 4 DOOR, CLASSIC STATION WAGON, STATION WAGON | 6 Cyl 4.3L
View related parts
Chevrolet Caprice Solenoid Asm,EGR Control Valve Relay
Part Number: 1997125
Product Specifications
- Other Name: SOLENOID, Emission Control System
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1983 Chevrolet Caprice | 4 DOOR, CLASSIC 2 DOOR, CLASSIC 4 DOOR, CLASSIC STATION WAGON, STATION WAGON | 6 Cyl 3.8L, 8 Cyl 4.4L
View related parts
Chevrolet Caprice Solenoid Assembly, Egr Control Valve Relay
Part Number: 1997168
Product Specifications
- Other Name: SOLENOID, Emission Control System
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984-1988 Chevrolet Caprice | 4 DOOR, BROUGHAM 4 DOOR, CLASSIC 2 DOOR, CLASSIC 4 DOOR, CLASSIC STATION WAGON, STATION WAGON | 6 Cyl 4.3L, 8 Cyl 5.0L
View related parts
Chevrolet Caprice Solenoid Assembly, Egr Control Valve Relay
Part Number: 1997160
Product Specifications
- Other Name: SOLENOID, Emission Control System
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1990 Chevrolet Caprice | 4 DOOR, BROUGHAM 4 DOOR, CLASSIC 2 DOOR, CLASSIC 4 DOOR, CLASSIC STATION WAGON, STATION WAGON | 6 Cyl 4.3L
View related parts
Chevrolet Caprice Valve Assembly, Egr & Carb Idle Speed & Vacuum
Part Number: 1997126
Product Specifications
- Other Name: SOLENOID, Emission Control System
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1986-1990 Chevrolet Caprice | 4 DOOR, BROUGHAM 4 DOOR, CLASSIC 2 DOOR, CLASSIC 4 DOOR, CLASSIC STATION WAGON, STATION WAGON | 8 Cyl 5.0L

Chevrolet Caprice EGR Vacuum Solenoid Parts Questions & Experts Answers

Solenoid Asm,EGR Control Valve Relay
1997169
Q: What is the purpose and operation of the EGR Vacuum Solenoid and EGR Valve on Chevrolet Caprice?
A: The system reduces exhaust-emitted nitrogen oxides by recirculating a portion of the exhaust gas. The EGR valve, on the intake manifold, is central to this system. Two EGR valve types exist: negative and positive backpressure. It's inactive at idle and during deceleration, controlled by a thermal vacuum switch. EGR issues can cause rough idling and performance. To inspect, ensure the diaphragm plate moves freely and observe engine speed changes when manually depressed. Examine vacuum lines for blockages. Test the thermal vacuum switch with a gauge, replacing if faulty. For EGR valve replacement, disconnect vacuum hose, remove, and install a new valve with a gasket. For the switch, drain coolant, remove, and install a new one.

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