Will Toyota vvt solenoid valve idle at high speed due to oil leakage?

Yes, the leakage of Toyota VVT solenoid valve may lead to high idle speed. VVT solenoid valve is an important part of engine control system, which is used to adjust the opening time and degree of intake valve to optimize combustion efficiency and improve power output. If the VVT solenoid valve leaks oil or gas, the opening and closing time and degree of the intake valve will be abnormal, thus affecting the working state of the engine.

When the VVT solenoid valve leaks oil, it may cause the intake valve to close or open at an inappropriate time, resulting in incomplete or excessive combustion, thus affecting the idle speed control of the engine. This may lead to high idle speed, because the engine cannot properly adjust the gas supply at idle speed.

Similarly, the air leakage of VVT solenoid valve will also lead to the failure of intake valve control, which will further affect the idle speed control of the engine. Air leakage may cause the intake valve not to close or open correctly, thus affecting the combustion process and cylinder pressure. This may also cause the problem of high idle speed.

It should be noted that the oil leakage of VVT solenoid valve is not the only reason for high idle speed, and there may be other faults or problems. Therefore, if it is found that the idle speed is too high, it is best to send the vehicle to a professional garage for inspection and maintenance, so as to determine the specific reasons and take corresponding measures to repair the problem.