Focus L4-2.0L SOHC VIN P (2000)
Compression Check: Testing and Inspection
NOTE: Removing fuses and disconnecting electrical components causes the Powertrain Control Module (PCM) to show an error message. After
measurement has been carried out this error message should be cleared from memory by connecting NGS.
NOTE: Only check the compression pressure with the valves set to the prescribed clearance (if this can be adjusted).
Check the compression pressure with the engine at operating temperature.
Differing designs of compression pressure recorder and varying starter motor speeds usually only make it possible to check that the compression is the
same in all cylinders.
Check the Compression Pressure
WARNING: On manual transaxles shift the transaxle into neutral. On automatic transaxles select "P". Failure to follow these instructions
may result in personal injury.
1. Open the Central Junction Box (CJB) and remove the fuel pump relay.
2. Start the engine: the engine will start up, run for a few seconds and then stall.
NOTE: Turn the spark plug connectors slightly before pulling them off. Pull on the connector, not on the cable.
3. Pull off the spark plug connectors.
4. Pull off the ignition coil connector.
5. Remove the spark plugs.
