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Home >> Acura >> 2009 >> CSX Type-S >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Cylinder Head (J37A4)) >> Engine Compression Inspection

Engine Compression Inspection

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: After the inspection, you must reset the powertrain control module (PCM) Otherwise, the PCM will continue to stop the fuel injectors from operating
  1. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
  2. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see step 2 on GENERAL TROUBLESHOOTING INFORMATION )
  3. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode
  4. Make sure the HDS communicates with the vehicle and the PCM If it does not communicate, troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING )
  5. Select ALL INJECTORS STOP in the PGM-FI INSPECTION menu with the HDS
  6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
  7. Remove the six ignition coils (see IGNITION COIL REMOVAL/INSTALLATION )
  8. Remove the six spark plugs
  9. Attach the compression gauge to a spark plug hole
    10. Fig 1: Attaching Compression Gauge To Spark Plug Hole
    G05986856Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Step on the accelerator pedal to open the throttle fully, then crank the engine with the starter motor, and measure the compression

    11. Compression Pressure 

    Above 932 kPa (9 5 kgf/cm 2  , 135 psi) 

  11. Measure the compression on the remaining cylinders

    12. Maximum Variation 

    Within 196 kPa (2 0 kgf/cm 2  , 28 psi) 

  12. If the compression is not within specifications, check the following items, then remeasure the compression
    • Incorrect valve clearance
    • Confirmation of cam timing
    • Damaged or worn cam lobes
    • Damaged or worn valves and seats
    • Damaged cylinder head gaskets
    • Damaged or worn piston rings
    • Damaged or worn piston and cylinder bore
  13. Remove the compression gauge from the spark plug hole
  14. Install the six spark plugs
  15. Install the six ignition coils (see IGNITION COIL REMOVAL/INSTALLATION )
  16. Select PCM reset (see ECM/PCM RESET ) in the PGM-FI INSPECTION menu to cancel ALL INJECTORS STOP with the HDS
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