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Diagnostic Aids

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Malibu, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. An arcing spark plug wire or an arcing ignition coil to the ICM may cause a stall, misfire or a no start condition.
  2. The following may cause a no start condition:
    • Crankshaft reluctor wheel damage or improper installation.
    • The CKP sensor coming in contact with the reluctor wheel.
    • Foreign material passing between the CKP sensor and the reluctor wheel.
  3. Excess crankshaft end play will cause the CKP sensor reluctor wheel to move out of alignment with the CKP sensor. This could result in a no start condition, a start and stall condition or erratic performance.
  4. An improperly installed crankshaft could cause excess crankshaft end play.
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