Fuel Pressure Regulator Vacuum Switching Valve (VSV): Calif.

Disconnect electrical connector and vacuum hoses from fuel pressure regulator VSV. See COMPONENT LOCATIONS  under INTRODUCTION. Replace VSV if it does not operate as follows:

• At 68°F (20°C), resistance across terminals is 33-39 ohms.
• There is no continuity between VSV case (ground) and each terminal of VSV connector (this checks for an internal short).
• Blow through port "E". See Figure. Air comes out of port "G".
• Apply battery voltage across terminals. Blow air through port "E". Air comes out of filter.