Engine Compression Inspection
NOTE: After this inspection, you must select engine control module (ECM)/powertrain control module (PCM) reset using the Honda PGM Tester or the Honda Diagnostic System (HDS) otherwise ECM/PCM continues to stop the fuel injectors.
| 1. | Warm up the engine to normal operating temperature (cooling fan comes on).
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| 2. | Turn the ignition switch OFF.
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| 4. | Select PGM-FI, select inspection, then select the ALL INJECTORS OFF function on the Honda PGM Tester or the HDS.
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| 6. | Remove the four spark plugs.
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| 7. | Attach the compression gauge to the spark plug hole.
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| 8. | Open the throttle fully, then crank the engine with the starter motor and measure the compression.
| Compression Pressure: | | Above 930 kPa (9.5 kgf/cm2, 135 psi) |
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| 9. | Measure the compression on the remaining cylinders.
| Maximum variation: | | Within 200 kPa (2.0 kgf/cm2, 28 psi) |
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| 10. | 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
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| 11. | Select ECM/PCM reset to stop the ALL INJECTORS OFF function on the Honda PGM Tester or the HDS.
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