An idle air management (IAC) valve is a tool that controls the quantity of air that bypasses the throttle valve when the engine is idling. This enables the engine to keep up a constant idle pace, even when the load on the engine modifications. A defective IAC valve could cause the engine to idle too excessive or too low, or to stall. Checking the IAC valve is a comparatively easy process that may be performed with a couple of primary instruments.
The IAC valve is often positioned on the throttle physique or consumption manifold. It’s normally a small, spherical gadget with a black or grey plastic housing. To verify the IAC valve, you will want a multimeter and a 12-volt energy supply. First, disconnect {the electrical} connector from the IAC valve. Then, join the constructive lead of the multimeter to the constructive terminal of the IAC valve, and the adverse lead of the multimeter to the adverse terminal of the IAC valve. The multimeter ought to learn 12 volts. If it doesn’t, then the IAC valve is defective and must be changed.
