MT Vehicles

- In response to the depressing stroke of the throttle pedal, the throttle body opens/closes its valve to regulate the air volume to be taken in the combustion chamber.
- During idling, the throttle valve is almost fully closed and the air flow through the throttle body is less than that passing through the carburetor.
- More than half of the air necessary for idling is supplied to the intake manifold via the idle air control solenoid valve.
- And the idle air control solenoid valve properly controls the engine idle speed, so it does not need to be adjusted.