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Home >> Mercury >> 2000 >> Cougar 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 483 (Engine System-General Information) >> Diagnosis And Testing >> Engine >> Compression Test >> Check the compression pressure - 2.0L

Check the compression pressure - 2.0L

WARNING: This page is about a different car, the 2002 Mercury Cougar. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Checking Compression Pressure - 2.0L
G03418058Courtesy of FORD MOTOR CO.
WARNING: On manual transaxles shift the transaxle into neutral. On automatic transaxles select "P". Failure to follow this instructions will result in personal injury.
  1. Open the central junction box (CJB).
  2. Remove the fuel pump relay (R8).
  3. Start the engine - the engine will start up, run for a few seconds and then stall.
  4. Remove the cover plate from the cylinder head cover.
  5. Remove the spark plugs.
  6. Pull off the spark plug connectors.
  7. Pull off the ignition coil electrical connector.
  8. Install auxiliary starter switch in starting circuit. With ignition switch OFF, using auxiliary starter switch, crank engine a minimum of five compression strokes and record the highest reading. Note the approximate number of compression strokes required to obtain the highest reading.
  9. Repeat test on each cylinder, cranking the engine approximately the same number of compression strokes.
  10. Install the components in the reverse order, observing the specified tightening torques.
  11. Reset the PCM fault memory.
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