What is vacuum switching valve?
The vacuum switching valve (VSV) which controls the vacuum supply to the actuator is normally closed and passes vacuum to the actuator when it is energized by the ECU. By energizing the VSV vacuum is passed to the actuator, closing the air control valve. This effectively lengthens the intake manifold run.
What happens when the EGR valve goes bad?
If your EGR valve is stuck in the open position, it can allow too little or too much exhaust gas into the combustion chamber. This can throw off the air/fuel mixture inside (which needs to be perfect) and cause the engine to idle rough.
How does the vacuum switching valve on a 1998 Camry work?
by Walt Sampson. The vacuum switching valve (VSV) is a part of the exhaust gas recirculation (EGR) system of the 1998 Toyota Camry. The VSV is connected to the EGR valve. The function of the EGR system is to recirculate exhaust gases to the intake manifold of the engine and thereby reduce the nitrous oxide emissions of the vehicle (References 1).
What does the VSV do on a 1998 Toyota Camry?
The vacuum switching valve (VSV) is a part of the exhaust gas recirculation (EGR system of the 1998 Toyota Camry. The VSV is connected to the EGR valve. The function of the EGR system is to recirculate exhaust gases to the intake manifold of the engine…
Where is the VSV valve on a Toyota?
Here I show how to test the VSV (Vacuum Switching Valve) which resides at the charcoal canister. Toyota calls it the VSV For Pressure Switching Valve. This is one of the diagnostic steps in solving the check engine light trouble code P0446 “Evaporative Emission Control (EVAP) system vent control circuit malfunction”.
What is the correct part number for a Toyota vacuum switching valve?
The part # on the original part is 90910-12150, which does not cross reference in this parts system… at all. The part # given to me at the store was 911-612 and it does not orientate correctly on the mounting rail, the connector does not match nor does it have the correct size nipples for the existing hoses. It is completely the wrong part.