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Home >> Eagle >> 1996 >> Talon Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - Turbo >> Emission Systems & Sub-Systems >> Exhaust Gas RECIRCULATION (EGR) >> EGR System Operation

EGR System Operation

  1. Disconnect vacuum hose with Green stripe from EGR solenoid located on firewall, just below wiper arm. See Figure .
  2. Using "T" fitting, install vacuum gauge between EGR solenoid and disconnected vacuum hose. Start engine and note vacuum with throttle at idle position and when quickly opening the throttle.
  3. With engine coolant temperature of 68°F (20°C) or less, no vacuum should exist with throttle at idle and when quickly opened. With engine coolant temperature of 176°F (80°C) or more, no vacuum should exist with throttle at idle, but vacuum should momentarily increase to more than 3.9 in. Hg when throttle is opened quickly.
  4. Shut engine off. Remove "T" fitting and vacuum gauge.
  5. Start engine and allow engine to idle. Using vacuum pump, apply at least 7.9 in. Hg of vacuum at vacuum hose fitting on top of EGR valve while noting if engine stalls or engine idle becomes unstable. If engine stalls or engine idle becomes unstable, EGR valve is operating.
  6. To check EGR valve vacuum supply, disconnect vacuum hose with White stripe from throttle body. This is the vacuum hose that goes from throttle body to EGR solenoid.
  7. Connect vacuum gauge on throttle body where vacuum hose was connected. Start engine. Increase engine speed and note vacuum reading.
  8. Vacuum should remain constant regardless of engine speed. If vacuum remains constant regardless of engine speed vacuum supply is okay. If no vacuum exists, check for restricted vacuum port on throttle body. Remove vacuum gauge and reinstall vacuum hose.
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