Note: Use a compression tester for petrol engines. The compression tester must be equipped with a universal tip (rubber) or an adapter with a ¼ pipe thread. Follow the instructions for use supplied with the compression tester by the manufacturer.
1. Remove the spark plugs.
2. Connect the compression gauge (1) to the engine.
3. Connect the diagnostic scanner to the car and run the following commands:
- RZ009: programming vehicle functions (VEHICLE FUNCTION PROGRAMMING).
- VP036: Fuel Suppression (FUEL SUPPLY INHIBITION).
4. Move the gear shift lever to neutral position.
5. Start the starter until the compression gauge readings stabilize.
Note: During the compression measurement, press the accelerator pedal all the way down to fully open the throttle valve.
6. Measure the compression in the remaining engine cylinders in a similar manner.
Note: It is necessary to pause for at least 10 seconds between starting the starter, since the starter may not turn on due to overheating protection.
7. Disconnect the compression gauge.
8. Install spark plugs.
9. Using the diagnostic tool, run command VP037: "Stop fuel supply suppression" (STOP FUEL SUPPLY INHIBITION).
10. Start the engine.
Note: If the engine does not start, use the diagnostic tool to run command VP037: "Fuel Suppression Stop" (STOP FUEL SUPPLY INHIBITION) or turn off the ignition and wait one minute before trying to start the engine again.