Cold Start Valve

Cold start valve is mounted on intake manifold and sprays fuel during starting. It provides additional enrichment so engine will start easily. Valve is powered through starter circuit and grounded through thermo time switch. It operates only while cold engine is being cranked.

Fig 1: Fuel Pressure Regulator

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Fig 2: Effect Of Frequency Valve On Fuel Distributor

Courtesy of VOLKSWAGEN UNITED STATES, INC.