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System Test

  1. Disconnect Red-striped vacuum hose running from throttle body and connect to hand vacuum pump. Plug nipple on throttle body where purge hose was removed.
  2. With engine coolant temperature at 140°F (60°C) or less and engine idling, apply 14.8 in. Hg vacuum. Vacuum should hold.
  3. With engine coolant temperature at 158°F (70°C) or more and engine idling, apply 14.8 in. Hg. 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 14.8 in. Hg. of vacuum. Vacuum should hold momentarily and then bleed down.
    NOTE: In step 4), vacuum should bleed down continuously if vehicle is at an altitude is 7200 Ft. (2200 m) or higher, or intake air temperature is 122°F (50°C) or lower.
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