Ignition System Symptom Diagnosis
IGNITION SYSTEM SYMPTOM DIAGNOSIS CHART
| Condition | Possible Cause | Action |
|---|---|---|
| Engine cranks, but will not start or hard to start (No spark) | Blown fuse for ignition coil assembly | Replace. |
| Loose connection or disconnection of lead wire | Connect securely. | |
| Faulty spark plug(s) | Replace. | |
| Faulty ignition coil assembly(s) | Replace. | |
| Faulty CMP sensor | Replace | |
| Faulty ECM | Replace. | |
| Maladjusted ignition timing | Adjust. | |
| Poor fuel economy or engine performance | Incorrect ignition timing | Adjust. |
| Faulty spark plug(s) | Replace. | |
| Faulty ignition coil assembly(s) | Replace. | |
| Faulty CMP sensor | Replace. | |
| Faulty ECM | Replace. | |
| Faulty knock sensor | Replace |