What is another name for idle air control valve?
The idle air control valve, also called the IAC or auxiliary air valve, bypasses the closed throttle plates to help ensure that the engine doesn’t stall. Depending on its design, the IAC valve may be part of, attached to or separate from the throttle body.
What is the idle air control valve connected to?
The idle air control valve (IAC) is usually connected to the throttle body next to the intake manifold. Consequently, it is the engine control unit (ECU) that manages all the functions of the valve.
What does the idle air control valve do?
The idle control valve, also commonly referred to as the idle air control valve, is an engine management component that is found in one form or another on the majority of road going vehicles. Its purpose is to control and regulate the engine idle speed, increasing and decreasing it as necessary to keep up with operating conditions.
Why does my Volvo car stall at idle?
It got warm here a couple of days ago for the first time this year (~80-85F) and our ’97 855 GLT Volvo at 155k miles suddenly started to have a wandering idle speed and stalling at idle, but only when the car was fully warmed up. The stalling symptom was worst right after restarting the car after it had been running for a while (hot start).
When to know if your idle control valve needs replacement?
If your vehicle is experiencing any of the symptoms above, or you suspect that your idle control valve may be having a problem, have the vehicle diagnosed by a professional technician to determine if the idle control valve needs replacement. Looking for an OBD2 code reader to diagnose your check engine light?
What causes the idle speed to go up or down?
If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls. 2. Check Engine Light comes on