Mixers Venturi Impco Vacuum Power Valve

Details

When the engine's load is low and the manifold vacuum is high, the Vacuum Power Valve (VPV) remains closed, maintained by the strong vacuum signal from the manifold.

• As the engine's load increases and the manifold vacuum decreases, the diminished vacuum signal allows the VPV to open, enriching the air-fuel mixture.
• This adjustment provides additional power during high engine loads.