Ignition System Symptom Diagnosis
IGNITION SYSTEM SYMPTOM DIAGNOSIS REFERENCE
| 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 or sensor rotor | Clean, tighten or replace . | |
| Faulty CKP sensor or sensor plate | Clean, tighten or replace . | |
| Faulty ECM | Replace . | |
| Poor fuel economy or engine performance | Incorrect ignition timing | Check related sensors and CKP sensor plate . |
| Faulty spark plug(s) | Replace . | |
| Faulty ignition coil assembly(s) | Replace . | |
| Faulty CMP sensor or sensor rotor | Clean, tighten or replace . | |
| Faulty CKP sensor or sensor plate | Clean, tighten or replace . | |
| Faulty ECM | Replace . | |
| Faulty knock sensor | Replace . |