Metro L4-079 1.3L VIN 2 MFI (2001)
Compression Check: Testing and Inspection
Perform a compression test in order to determine the cylinder compression pressure. Use a compression test in order to diagnose a lack of power, of
excessive oil consumption, or of poor fuel economy.
1. Verify that the battery is completely charged or almost completely charged.
Important: Allow the engine to warm up to normal operating temperature.
2. Disconnect the electrical connectors at both ignition coils.
3. Remove the two ignition coils (4) and the secondary spark plug wires from the valve rocker-arm cover.
4. Remove the four spark plugs from the engine.
5. Remove the Main Relay (1) from the Relay Box (2).
6. Install a compression gauge (2) into a spark plug hole. If necessary use an extension for the compression gauge.