13. Turbo Boost Test

13. TURBO BOOST TEST

Purpose:

The purpose of this test is to determine if the engine can develop sufficient boost to obtain specific power.

Turbo Boost Test

- Carefully inspect the intercooler tubes/connections, turbocharger connections, and MAP hose for signs of damage or leaks.
- Carry out the boost pressure test at 3,300 RPM minimum.






Recommended Procedure:

Note: If a sensor fails the turbo boost test, the test will abort. Refer to the appropriate sensor pin point test to continue diagnosis.
Note: Refer to the diagnostic tool information menu for examples of turbo boost test results.

- Key on, engine running.
- Carry out the Powertrain Air Management Turbo Boost Test using the diagnostic tool. Tests KA: Turbocharger System Performance

Possible Causes:

- MAP hose pinched or open
- Leaking intake, hoses or fittings
- Leaking exhaust system
- Turbocharger
- Base engine
- Intercooler hoses leaking
- Intercooler
- EGR sticking

Tools Required

- Diagnostic tool
- Tool, vane position sensor cable kit 418-626 or equivalent