Ignition Coil(s) Not Operating Properly

- For vehicles equipped with the 43.L engine, refer to Enhanced Ignition System Diagnosis in Computer and Control Systems-4.3L.
- For vehicles equipped with the 5.0-5.7L engine, refer to Enhanced Ignition System Diagnosis in Computer and Control Systems-5.0/5.7L.
- For vehicles equipped with the 7.4L engine, refer to Enhanced Ignition System Diagnosis in Computer and Control Systems-7.4L.