Engine Compression: Inspection

NOTE:  After this inspection, you must do the PCM - Reset . Otherwise, the PCM will continue to stop the injectors from operating.

1. Engine - Warm Up

   1. Start the engine. Hold the engine speed at 3, 000 RPM with no load (in P or N) until the radiator fan comes on, then let it idle.

2. HDS DLC - Connect 
3. All Injector Stop - Select

   1. Select ALL INJECTORS STOP in the PGM-FI INSPECTION menu with the HDS. 2. Turn the vehicle to the OFF (LOCK) mode.

4. Ignition Coil and Spark Plug - Remove
5. Engine Compression - Inspect

   Courtesy of HONDA, U.S.A., INC.

   1. Attach a compression gauge to the spark plug hole. 2. Step on the accelerator pedal to open the throttle fully, then crank the engine with the starter motor, and measure the compression. Compression Pressure  Above 930 kPa (9.48 kgf/cm 2, 134.8 psi)  3. Measure the compression on the remaining cylinders. Maximum Variation  Within 200 kPa (2.04 kgf/cm 2, 29.0 psi)  4. If the compression is not within specifications, perform a cylinder leak down test to determine the problem area. Then check the following items, and remeasure the compression: Incorrect valve clearance Confirmation of camshaft timing Damaged or worn cam lobes Damaged or worn valves and seats Damaged cylinder head gasket Damaged or worn piston rings Damaged or worn piston and cylinder bore 5. Remove the compression gauge from the spark plug hole.

6. Ignition Coil and Spark Plug - Install
7. All Injector Stop - Cancel

   1. Select PCM reset  in the PGM-FI mode menu to cancel ALL INJECTORS STOP with the HDS.