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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 758 (Symptom Troubleshooting [Engine Mechanical]) >> Engine Control System Operation Inspection >> Spark Test

Spark Test

WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the fuel pump relay.
  2. Verify that each ignition coil and connector is connected properly.
    3. WARNING:
    • High voltage in the ignition system can cause strong electrical shock which can result in serious injury. Avoid direct contact to the vehicle body during the following spark test.
    Fig 1: Inspecting Fuel Pump Control System
    G00975499Courtesy of MAZDA MOTORS CORP.
  3. Inspect the ignition system in the following procedure. See Fig 1.
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