Turbocharger: Testing and Inspection
DIAGNOSIS AND TESTING - TURBOCHARGER BOOST PRESSURENOTE: This diagnostic procedure is to be used with the DR13111 while test driving the vehicle under normal load and driving conditions.
Low turbocharger boost pressure can cause poor engine performance and driveability concerns. The following procedure will test the turbocharger boost pressure.
1. Loosen clamps holding air inlet duct rubber sleeve to the intake manifold and air inlet duct. Remove rubber sleeve (Fig. 18).
2. Position Special Tool 8462 onto air inlet duct and intake manifold. Using the existing clamps tighten to 8 Nm (72 inch lbs.).
3. Install the 3447.5 kPa 500 psi (gray) Pressure Transducer (part of OT-CH8520 Transducer Kit) into Special Tool 8462.
4. Connect the DRB III to the pressure transducer following the instructions supplied with the DRB III .
5. Enter DRBIII into pressure reading mode and test drive vehicle.
6. The turbocharger boost pressure must be between 110 - 138 kPa (16 - 20 psi.). If pressure readings are lower than 110 kPa (16 psi.) inspect for the following:
- Restricted air inlet system
- Leak in the charge air cooler system
- Turbocharger wastegate broken or misadjusted
- Turbocharger damaged