What is the normal idle speed of Corolla?

Different models of Pacific Auto Network have different idle values because of different engines. Usually, the idle speed is in the range of 500 to 850 rpm. The electronically controlled idle speed control valve ensures the correct idle speed of EFI engine. Due to oil pollution and carbon deposition, the idle speed control valve is slow or stuck, and the throttle valve is poorly closed. Ecu can't correctly adjust the engine idle speed, clean or replace the idle speed control valve, and use a special decoder to basically set the idle speed.

When the intake pipe leaks, the relationship between the intake air volume and the opening of the idle control valve will not strictly follow the original function, that is, the intake air volume changes abruptly with the change of the idle control valve, and the air flowmeter cannot measure the real intake air volume, which leads to the inaccurate control of the intake air volume by ecu. Find the leak and reseal or replace the phase parts. If the injector leaks or is blocked, the mixture will be too rich or too thin, which will make individual cylinders work badly and lead to unstable engine idle speed. If the fuel injector is blocked, the mixture will be too thin, which will also cause the oxygen sensor to generate a low potential signal, and the computer will issue instructions to make the mixture rich according to this signal. If the command exceeds the control limit, the computer will mistakenly think that the oxygen sensor is faulty and remember the fault code. Clean the injectors and check the fuel injection quantity of each injector to ensure that there is no blockage or leakage.