What is the purpose of the EGR Tube,EGR Vacuum Solenoid and EGR Valve in automotive engines?

The EGR system is used in automotive engines to reduce NOx emissions and works by diluting the air/fuel charge with exhaust gas, lowering the combustion temperature. The amount of EGR needed depends on engine geometry and conditions, determined through testing. Too much or too little EGR flow can cause engine issues. The EGR valve and pipe can be removed and installed following procedures, and the control solenoid can be replaced.

Genuine Cadillac Eldorado EGR Vacuum Solenoid

EGR Valve Vacuum Solenoid

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5 EGR Vacuum Solenoids found

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Cadillac Eldorado Valve,EGR
Part Number: 12576918
- Other Name: VALVE, Emission Control System; EGR Valve, Throttle Position Sensor
- Replaces: 12568582, 17113618, 17113303, 17113615, 17093020, 17113619, 17096188, 17113405, 17113575, 17113278
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Fits the following Vehicles:
2000-2002 Cadillac Eldorado | ELDORADO | 8 Cyl 4.6L
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Cadillac Eldorado Valve Asm
Part Number: 1997202
- Other Name: VALVE, Emission Control System; Solenoid
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Fits the following Vehicles:
1988-1993 Cadillac Eldorado | COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 4.5L, 8 Cyl 4.9L
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Cadillac Eldorado Valve Asm,EGR Solenoid
Part Number: 1997156
- Other Name: VALVE, Emission Control System
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Fits the following Vehicles:
1986-1987 Cadillac Eldorado | COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 4.1L
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Cadillac Eldorado Valve Asm,EGR Electronic Vacuum Regulator Solenoid
Part Number: 1997634
- Other Name: VALVE, Emission Control System
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Fits the following Vehicles:
1982-1985 Cadillac Eldorado | BIARRITZ, COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 4.1L
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Cadillac Eldorado Valve Asm,EGR Electronic Vacuum Regulator Solenoid
Part Number: 1997637
- Other Name: VALVE, Emission Control System
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Fits the following Vehicles:
1982-1985 Cadillac Eldorado | BIARRITZ, COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 4.1L
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Cadillac Eldorado EGR Vacuum Solenoid Parts Questions & Answers

Valve Asm
1997202
Q: What is the purpose of the EGR Tube,EGR Vacuum Solenoid and EGR Valve in automotive engines?
A: The EGR system is used in automotive engines to reduce NOx emissions and works by diluting the air/fuel charge with exhaust gas, lowering the combustion temperature. The amount of EGR needed depends on engine geometry and conditions, determined through testing. Too much or too little EGR flow can cause engine issues. The EGR valve and pipe can be removed and installed following procedures, and the control solenoid can be replaced.