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Home >> Eagle >> 1989 >> Summit DL, Standard >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests >> Emission Systems & Sub-Systems >> Fuel Evaporation >> Purge Control System
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Purge Control System

  1. Disconnect Red striped vacuum hose from throttle body, plug disconnected nipple. Connect hand vacuum pump to disconnected hose. Start engine. Let Idle.
  2. With engine temperature 140°F (60°C) or less (cold engine), apply 14 in. Hg. Vacuum should hold. Raise engine speed to 3000 rpm. Vacuum should hold.
  3. Return to idle. Bring engine temperature to 158°F (70°C) or more (warm engine). Apply 14 in. Hg. Vacuum should hold. Raise engine speed to 3000 rpm (within 3 minutes of starting). Vacuum should not hold.
  4. After 3 minutes have passed since starting warm engine, apply 14 in. Hg. Vacuum should hold momentarily, then leak down.
NOTE: If altitude is 7200 feet (2200 meters) or higher, OR intake air temperature 122°F (50°C) or less, vacuum will leak continuously.
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