* Brake Booster: A large hose connects to the intake manifold or a vacuum source near it. This is usually a thick hose.
* Manifold Absolute Pressure (MAP) Sensor: A smaller hose connects the MAP sensor to the intake manifold. The MAP sensor is often located near the throttle body.
* EGR Valve (Exhaust Gas Recirculation): If equipped, this will have a vacuum hose connected to it. Its location varies slightly depending on the engine.
* Transmission: Some automatic transmissions use vacuum for shifting, and this will involve hoses running to the transmission.
* Various other components: Smaller hoses might connect to things like the HVAC system (heat and air conditioning) for climate control functions, the distributor (on some engine types), or other emission control devices.
To find them:
1. Consult a repair manual: A Chilton's or Haynes repair manual specific to your 2000 Chevy Cavalier will have diagrams showing the vacuum hose routing. This is the BEST way to find them all.
2. Visual inspection: Carefully examine the engine bay. Look for small to medium diameter hoses that are usually black or dark in color. Follow them to see where they connect.
3. Listen for leaks: With the engine running, listen carefully for hissing sounds, which could indicate a leak in a vacuum hose.
Important Note: Working with vacuum hoses requires care. Misconnecting them can lead to poor engine performance or even damage. If you are not comfortable working on your car, it's best to take it to a qualified mechanic.
