CA18DET Hard Start Due to Ignition System Failure

Verify the ignition system by inspecting the spark plugs for signs of wear or carbon buildup. Check the primary ignition signal to the coil packs; a lack of spark across all cylinders can indicate a failure in the Crank Angle Sensor (CAS) or the ignition module. Ensure all coil pack connections are clean, free of corrosion, and securely seated on the spark plugs.