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Home >> Eagle >> 1995 >> Vision TSi >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 3.3L >> Test NTC-13A >> Checking EGR System
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Checking EGR System

NOTE: After each repair, perform TEST VER-2  .
  1. Disconnect vacuum hose from EGR solenoid. Connect vacuum gauge to disconnected vacuum hose. Start engine. If vacuum is more than 10 in. Hg at idle, go to step 3). If vacuum is less than 10 in. Hg at idle, go to next step.
  2. Turn engine off. Disconnect EGR vacuum signal hose at intake manifold. Connect a vacuum gauge to intake manifold nipple. Start engine. Read vacuum gauge at idle. If vacuum is more than 10 in. Hg at idle, repair restriction or leak in vacuum line to EGR solenoid. If vacuum is less than 10 in. Hg at idle, repair plugged vacuum nipple at throttle body.
  3. If vacuum is more than 10 in. Hg at idle in step 1), stop engine. Disconnect vacuum gauge, and reconnect vacuum hose to EGR solenoid. Disconnect vacuum hose from EGR valve, and connect vacuum gauge to disconnected hose. Go to next step.
  4. Start engine. While observing gauge vacuum gauge, disconnect EGR solenoid 2-way connector. If vacuum is more than one in. Hg at any time, replace EGR valve assembly. If vacuum is not more than one in. Hg at any time, go to next step.
  5. Turn ignition off. Disconnect hose to EGR valve backpressure signal tube. Adjust a shop air hose to 20 psi. Connect shop air to nipple on base of EGR valve. Listen for a tone change while opening and closing throttle. If tone changes, replace EGR valve assembly. If tone does not change, go to next step.
  6. Remove vacuum gauge. Cap open nipple at EGR valve base. Connect hand vacuum pump to EGR valve. Start engine. While slowly applying vacuum to EGR valve, listen for engine RPM change. If engine RPM does not change, replace EGR valve assembly. If engine RPM changes, go to next step.
  7. Turn ignition off. Apply 10 in. Hg and hold for 30 seconds. If vacuum does not hold for 30 seconds, replace EGR valve assembly. If vacuum holds for 30 seconds, test is complete.
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