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Home >> Mazda >> 2004 >> MPV ES >> Repair and Diagnosis >> Engine Performance >> Emissions >> EGR Function Testing - MAZDA >> EGR Function Testing - MAZDA >> Test 2 >> EGR Solenoid Valve
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EGR Solenoid Valve

  1. Disconnect EGR solenoid valve harness connector. Remove vacuum hose at EGR valve. Connect vacuum gauge to EGR vacuum hose. Start and warm engine to normal operating temperature.
  2. Increase engine speed to 1100-3300 RPM. Vacuum gauge should not read any vacuum. Allow engine to idle. Apply 12 volts across EGR solenoid valve terminals. Increase engine speed again. Observe vacuum gauge. Vacuum should be present.
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