Fuel Pressure Regulator Vacuum Switching Valve (VSV)
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 should be 37-44 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 Fig 1. Air comes out of port "G".
- Apply battery voltage across terminals. Blow air through port "E". Air comes out of filter.