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. Wiper Arm Assembly





NOTE: Set the wiper arms to the auto-stop position before removal.

1. Remove the cowl top wiper covers (A).

2. Remove the wiper arms (B).

5. Both Side Cowl Covers





1. Remove the side cowl cover (A).

2. The left side is shown; repeat on the right side.

6. Center Cowl Cover





1. Remove the center cowl cover (A).

2. Disconnect the windshield washer tube (B).

3. If necessary, remove the hood rear seal (C).

7. Under Cowl Panel





1. Remove the under cowl panel (A).

8. Ignition Coil Cover





1. Remove the ignition coil cover.

9. Ignition Coil





1. Remove the ignition coils.

10. Spark Plug





1. Remove the spark plugs.

Inspection

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

1. Engine Compression - Inspection





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.







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 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. Ignition Coil Cover





1. Install the ignition coil cover.

4. Under Cowl Panel





1. Install the under cowl panel (A).

5. Center Cowl Cover





1. If necessary, install the hood rear seal (A).

2. Connect the windshield washer tube (B).

3. Install the center cowl cover (C).

6. Both Side Cowl Covers





1. Install the side cowl cover (A).

2. The left side is shown; repeat on the right side.

7. Wiper Arm Assembly





NOTE: Set the wiper arms to the auto-stop position before installation.

1. Install the wiper arms (A).

2. Install the cowl top wiper covers (B).

8. 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.

9. All Injectors Stop

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