Diagnosis And Testing - Turbocharger
Check for Diagnostic Trouble Codes (DTC'S) stored in PCM memory. If any DTC'S are present, refer to POWERTRAIN DIAGNOSTIC PROCEDURES article.
TURBOCHARGER DIAGNOSIS
| CONDITION | POSSIBLE CAUSES |
|---|---|
| Low boost pressure, lack of power | Clogged air filter |
| Leaks between engine and turbocharger | |
| Exhaust restriction | |
| Restriction in charge air cooler hose(s) | |
| Wastegate stuck open | |
| Wastegate actuator malfunction | |
| Seized turbocharger shaft | |
| Overboost | Wastegate stuck shut |
| Wastegate actuator malfunction | |
| Noisy operation or vibration | Leak(s) in charge air cooler hose(s) |
| Intake or exhaust leaks | |
| Oil starvation | |
| Worn turbocharger bearings | |
| Damaged turbine/compressor fins | |
| Blue smoke from exhaust | Oil return line blocked |
| Engine breather clogged | |
| Turbocharger shaft seals damaged |