Engine Compression Inspection - Honda Accord 2008 Manual

07/11/02 09:24:09 61TA0000_060_0056
Cylinder Head

Engine Compression Inspection

NOTE: After this inspection, you must reset the engine
control module (ECM)/powertrain control module
(PCM), otherwise the ECM/PCM will continue to stop
the fuel injectors from functioning.
1. Warm up the engine to normal operating
temperature (cooling fan comes on).
2. Turn the ignition switch to LOCK (0).
3. Connect the HDS to the data link connector (DLC)
(see step 2 on page 11-3).
4. Turn the ignition switch to ON (II).
5. Make sure the HDS communicates, with the vehicle
and the ECM/PCM. If it doesn't communicate,
troubleshoot the DLC circuit (see page 11-208).
6. Select PGM-FI, INSPECTION, then ALL INJECTORS
OFF on the HDS.
7. Turn the ignition switch to LOCK (0).
8. Remove the four ignition coils (see page 4-21).
9. Remove the four spark plugs.
10. Attach a compression gauge to the spark plug hole.
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11. Open the throttle fully, then crank the engine with
the starter motor and measure the compression.
Compression Pressure:
2
Above 930 kPa (9.5 kgf/cm , 135 psi)
12. Measure the compression on the remaining
cylinders.
Maximum Variation:
Within 200 kPa (2.0 kgf/cm , 28 psi)
13. If the compression is not within specifications,
check the following items, then remeasure the
compression.
• Damaged or worn valves and seats
• Damaged cylinder head gasket
• Damaged or worn piston rings
• Damaged or worn piston and cylinder bore
14. Remove the compression gauge from the spark
plug hole.
15. Install the four spark plugs.
16. Install the four ignition coils (see page 4-21).
17. Select the ECM/PCM reset (see page 11-4) to cancel
the ALL INJECTORS OFF on the HDS.
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