Engine Controls - Trouble Shooting - No Codes: NVH Mazda Tribute I

ABNORMAL ENGINE NOISE

1. Check for incorrect drive belt tension.
2. Check for intake air system leak.
3. Check for loose components (intake air system, spark plug, etc.).
4. Check for low oil level.
5. Check for vacuum leak.
6. Check for worn engine parts.

ENGINE VIBRATION

1. Check for driveline malfunction.
2. Check for incorrect wheel balance.
3. Check for loose engine, transaxle or transmission mounts.
4. Check for loose or worn cooling fan.
5. Check for loose or worn drive belts and pulleys.
6. Check for suspension malfunction.