Ignition System
WARNING: This page is about a different car, the 2003 Pontiac Sunfire, 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
- To properly check the spark plugs or to correct a condition, refer to the following procedures:
- Ignition System Specifications. Go to IGNITION SYSTEMS in SERVICE & ADJUSTMENT SPECIFICATIONS - CAVALIER & SUNFIRE article or IGNITION SYSTEMS in SERVICE & ADJUSTMENT SPECIFICATIONS - ALERO, GRAND AM & MALIBU article.
- Spark Plug Inspection. Go to SPARK PLUGS under IGNITION SYSTEMS in SYSTEM & COMPONENT TESTING - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE article.
- Spark Plug Replacement. See appropriate REMOVAL & INSTALLATION article.
- Remove spark plugs and check for the following conditions:
- Correct heat range.
- Wet plugs.
- Cracks.
- Wear.
- Improper gap.
- Burned electrodes.
- Heavy deposits.
- Verify that the spark plugs are of the correct type.
- Check for proper ignition voltage output with the HEI Spark Tester (J 26792), or equivalent.
- An improper spark plug gap will cause a driveability condition. Gap the spark plugs using a wire gauge gap tool.
- Determine the cause of the fouling before replacing the spark plugs.
- Check for damaged or misaligned spark plug boots.
- Check the Ignition Control Module (ICM) for proper ground connection.