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System Test

  1. Disconnect Red-striped vacuum hose running from throttle body to purge control solenoid valve at throttle body. Connect a hand vacuum pump to disconnected vacuum hose. Plug nipple on throttle body where vacuum hose was removed.
  2. With engine coolant temperature at 140°F (60°C) or less and engine idling, apply 14 in. Hg vacuum. Vacuum should hold. Raise engine speed to 3000 RPM and again apply 14 in. Hg vacuum. Vacuum should hold.
  3. With engine coolant temperature at 158°F (70°C) or more and engine idling, apply 14 in. Hg vacuum. Vacuum should hold. Turn engine off. Start engine and within 3 minutes of starting engine, apply vacuum. Vacuum should bleed down.
  4. With engine running for more than 3 minutes after starting, raise engine speed to 3000 RPM and apply 15 in. Hg of vacuum. Vacuum should hold momentarily and then bleed down.
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