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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 440 (Engine Controls - Troubleshooting - No Codes) >> Symptoms >> Rough, Unstable Or Incorrect Idle & Stalling >> Ignition System

Ignition System

WARNING: This page is about a different car, the 2003 Cadillac Seville and 2003 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the Ignition Control (IC) circuits for proper connections at each ignition module assembly.
  2. Test for proper ignition voltage output using the J26792 Spark Tester.
  3. Inspect the ignition coils for cracks, or damage.
  4. Inspect for a missing or damaged ignition module assembly grounding spring.
  5. Inspect for misaligned, or damaged spark plug boots.
  6. Inspect the spark plugs.