The STANDARD IGNITION PVS91 SI Ported Vacuum Switch is engineered to regulate the flow of vacuum to the engine s vacuum advance system ensuring precise ignition timing and optimal engine performance This component is essential for maintaining engine efficiency and reducing harmful emissions Constructed with high quality materials the PVS91 SI offers exceptional durability and resistance to engine heat and contaminants ensuring a long service life Its design includes a brass and high temperature plastic housing providing a precise fit and reliable performance The switch features a thermal element that responds accurately to temperature changes facilitating consistent vacuum control Designed for direct fitment the PVS91 SI Ported Vacuum Switch ensures easy installation without the need for modifications reducing downtime and labor costs Its OE quality connectors and terminals guarantee a secure and reliable electrical connection facilitating seamless integration with the engine s vacuum system By incorporating the STANDARD IGNITION PVS91 SI Ported Vacuum Switch into your fleet s maintenance routine you can expect enhanced engine performance improved fuel efficiency and a reduction in harmful emissions This component addresses common issues associated with vacuum control failures such as engine stuttering stalling and increased fuel consumption thereby contributing to the overall reliability and operational efficiency of your fleet