Test sequence
WARNING: This page is about a different car, the 1996 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
- Measure boost pressure under full load, while driving on road.
Test duration per measurement: 10 seconds maximum
- Disconnect hose (at one end) running between intake manifold -1- and Diesel injection pump -2-.
- Using tee, connect VAG1397A turbocharger tester.
NOTE:
- To operate the VAG1397Aturbocharger tester see manufacturers operating instructions.
- If boost pressure is being measured while driving, a second person must be used to read and operate the turbocharger tester.
- Make sure that the pressure hose is not trapped between the hood and the body.
- Measure boost pressure at wide open throttle.
While driving on an open road:
- In 2nd gear (manual) or with transmission range selector lever in position 1 (automatic)
- While simultaneously applying brakes to maintain approx. 37 MPH (60 kph).
Specification: 0.60 to 0.83 bar (relative pressure)
If specification not obtained:
- Replace turbocharger.
If the boost pressure is too high and if the wastegate control line is not blocked, loose or leaking:
- Replace turbocharger (wastegate is faulty and unit can only be replaced as an assembly).