Cruze

Engine Compression Test

1. Remove the throttle body. Refer to Throttle Body Assembly Replacement : 1.6L LDE, LXV, 1.8L 2H0, and LUW .
2. Remove the spark plugs. Refer to Spark Plug Replacement .
3. Remove the relay holder cover.
4. Remove the fuel pump relay.

Check Compression for all cylinders:

Note: Engine revs at least 300/min.

1. Start the engine (approx. 4 seconds).
2. Compare the compression values.

Maximum pressure differential 100 kPa (14.5 psi)

1. Install the fuel pump relay.

•	Place into the socket.

•	Ensure the plug contacts are sound.

2. Install the relay carrier cover.
3. Install the spark plugs. Refer to Spark Plug Replacement .
4. Install the throttle body. Refer to Throttle Body Assembly Replacement : 1.6L LDE, LXV, 1.8L 2H0, and LUW .