Question

All of the following statements regarding manifold heat control valves are true EXCEPT:

- a manifold heat control valve improves fuel vaporization in the intake manifold especially when the engine is cold

- a manifold heat control valve stuck in the closed position causes a loss of engine power

- a manifold heat control valve stuck in the open position may cause an acceleration stumble

- a manifold heat control valve stuck in the closed position reduces intake manifold temperature

Answer 1

A manifold heat control valve is a component in an engine's intake manifold that improves fuel vaporization when the engine is cold and regulates the flow of hot exhaust gases. While a closed valve reduces engine power, an open valve can cause an acceleration stumble.

Step-by-step explanation:

A manifold heat control valve is a component in an engine's intake manifold that regulates the flow of hot exhaust gases into the intake manifold. It helps improve fuel vaporization in the intake manifold, especially when the engine is cold. When the valve is stuck in the closed position, it can cause a loss of engine power. Similarly, when the valve is stuck in the open position, it can cause an acceleration stumble. However, a manifold heat control valve stuck in the closed position does not reduce intake manifold temperature.