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Home >> Chevrolet >> 1998 >> Tracker 4D Utility, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Engine Component Tests - 1.6L >> Emission Systems & Sub-Systems >> Exhaust Gas RECIRCULATION (EGR) >> EGR By-Pass Check Valve

EGR By-Pass Check Valve

  1. Disconnect all vacuum line and harness connector from EGR by-pass check valve. Measure resistance between EGR by-pass check valve terminals. If resistance is 37-44 ohms at 68°F (20°C), go to next step. If resistance is not 37-44 ohms at 68°F (20°C), replace EGR by-pass check valve.
  2. Apply battery voltage across EGR by-pass check valve terminals. Blow air into center vacuum port. Air should escape from top vacuum port and not from bottom vacuum port. If valve operates as described, EGR by-pass check valve is okay at this time. If valve does not operate as described, replace EGR by-pass check valve.
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