The PCV (Trustworthy Crankcase Ventilation) valve is devolving on for helping to diminish emissions by working to supply the Correct air-fuel mixture for combustion. According to Tegger.com, changing the Engine oil on your 2002 Prius is one of the most accommodating preventive procedures for maintaining your PCV valve. There are many differential signs of a potentially failed PCV valve. You should research and moderate the PCV valve at two-year intervals.
Instructions
1. Handle your 2002 Prius. If you notice that your vehicle has less power than usual, one potential culprit is the air-fuel mixture, which is in part controlled by the PCV valve. As oil leaks into the throttle body and plate system due to a bad PCV valve, you may begin to notice that the gas pedal feels "sticky" when it is depressed.
2. Allow your 2002 Prius to sit and idle once it has warmed up to its normal operating temperature. If the PCV valve malfunctions, the throttle plate may not be able to close correctly, resulting in erratic idling and idle drops. If you notice sporadic idling accompanied by stalling out, then the PCV valve may need replacement.
3. Walk around behind your 2002 Prius. If you see blue smoke emanating from the tailpipe, oil has leaked into your intake manifold runners, which also results from a broken PCV valve. Also look for small drips and pools of oil on your driveway underneath your vehicle. Although not all oil leaks result from broken PCV valves, inspecting the PCV valve and manifold components will help to determine whether the leak's origin is from the PCV valve system. The PCV valve is behind the valve cover, which is where oil is added to your engine, and to the rear of the throttle body. The throttle body is where the air filter box connects to the manifold, which has the appearance of several curved ribs joined together, similar to the foldings of an accordion. If it does not make a clicking sound, then it should be replaced.5. Put your finger over the hole in the tube where the PCV screws in, feeling for a vacuum suck as it pulls air through the intake.
The PCV valve looks like a small nut with an opening in the top.4. Remove the PCV valve from your 2002 Prius while the vehicle is running and in the parked position. Shake the PCV valve, listening for a metallic clicking sound, which indicates that the valve is working properly.
If you do not feel a vacuuming or sucking effect, you may need to replace the valve or the hose, if not both components.
