Engine Compression Inspection

Engine Compression Inspection

Removal

1. Warm Up The Engine

1. Warm up the engine.

2. HDS DLC - Connection





NOTE: For specific operations, refer to the user's manual that came with the Honda Diagnostic System (HDS). Make sure the HDS is loaded with the latest software.

1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.

2. Turn the ignition switch to ON (II).

3. Make sure the HDS communicates with the vehicle. If it does not communicate, go to the DLC circuit troubleshooting.

3. All Injectors Stop

1. Select ALL INJECTORS STOP in the PGM-FI INSPECTION menu with the HDS.

4. Engine Cover





1. Remove the engine cover.

5. Ignition Coil





1. Remove the ignition coils.

6. Spark Plug





1. Remove the spark plugs.

Inspection

NOTE: After this inspection, you must reset the ECM/PCM. Otherwise, the ECM/PCM will continue to stop the injectors from operating.

1. Engine Compression - Inspection





1. Attach the compression gauge to a spark plug hole.

2. Step on the accelerator pedal to open the throttle fully, crank the engine with the starter motor, and measure the compression.







3. Measure the compression on the remaining cylinders.







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 cam 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.

Installation

1. Spark Plug





1. Apply a small amount of anti-seize compound to the plug threads, and screw the plugs into the cylinder head, finger tight, then tighten the plugs to the specified torque.








2. Ignition Coil





1. Install the ignition coils.

3. Engine Cover





1. Install the engine cover.

4. HDS DLC - Connection





1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.

2. Turn the ignition switch to ON (II).

3. Make sure the HDS communicates with the vehicle. If it does not communicate, go to the DLC circuit troubleshooting.

5. All Injectors Stop

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