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Home >> GMC >> 1987 >> Forward Control 6.2 J, Automatic, 400/M40 >> Repair and Diagnosis >> Engine Performance >> System >> EGR System - Gasoline >> System Testing >> EGR Bleed Solenoid Check (5.0L/5.7L Federal W/ A/T)

EGR Bleed Solenoid Check (5.0L/5.7L Federal W/ A/T)

  1. Disconnect EGR bleed solenoid connector.
  2. Connect a test light from solenoid terminal "A" to ground.
  3. With the ignition "ON" and engine stopped, the test light should light. If not, there is an open in circuit to ignition switch.
  4. Connect solenoid connector.
  5. Disconnect vacuum hose from solenoid to the EGR valve and connect a vacuum gage to solenoid.
  6. Start engine. There should be no vacuum reading. Replace solenoid if there is a reading.
  7. Connect a test light from solenoid terminal "B" to ground. Solenoid should energize and there should be a full vacuum reading. Replace solenoid as required.
  8. Connect a test light from terminal "D" at the TCC solenoid to ground. Solenoid should energize and there should be a full vacuum reading. If not, open is in circuit 386.
Fig 1: EGR Bleed Solenoid Check (5.0L/5.7L Federal - With A/T)
G50F00534