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Home >> Mitsubishi >> 2006 >> Lancer Evolution >> Repair and Diagnosis >> Engine Performance >> System >> Emission Control - Lancer Evolution >> Exhaust Gas RECIRCULATION (EGR) System >> EGR Port Vacuum Check

EGR Port Vacuum Check

  1. Disconnect the vacuum hose (yellow stripe) from the throttle body EGR vacuum nipple and connect a hand vacuum pump to the nipple.
    Fig 1: Connecting Hand Vacuum Pump To Nipple
    G04296168Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  2. Start the engine.
  3. Measure engine vacuum at idle.

    Standard value: 51 kPa (15 in Hg) or more 

  4. Reset the vacuum pump to "0" (Release vacuum).
  5. Using a stop watch, measure how long it takes for the vacuum gauge to reach 51 kPa (15 in Hg).

    Standard value: 1.0 second or less 

  6. If it takes more than 1.0 second for the gauge to reach 51 kPa (15 in Hg), the EGR may be restricted and should be cleaned.
    Fig 2: Measuring Engine Vacuum Idle
    G04296169Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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