Replacing the Idle Air Controller on a Mazda MPV

The idle speed on most modern fuel injected engines is controlled by an idle air control valve. This valve is controlled by the ECU and allows air to bypass the throttle body to maintain the idle speed.

The Idle Air controller on the Mazda MPV is located on the back of the intake manifold. It is held in place by two 10mm head bolts. Just remove the bolts and the old valve can be removed. It is easier to disconnect the wiring harness after the valve is off the manifold.

Install a new gasket and attach the wire to the replacement valve. Bolt the new valve down and you are done.

Start the engine and test the idle speed. The computer may take a moment to adjust to the new valve but the idle should smooth out and now be controlled ending embarrassing and dangerous stalls.