Tools Required
SA9127E
Gage Bar Set
- Warm up the engine to a normal operating temperature
of 98°C (208° F).
- Turn the ignition switch OFF.
- Remove the ignition coils. Refer to
Valve Rocker Arm Cover Removal - Left Side
and
Valve Rocker Arm Cover Removal - Right Side
.
- Remove the spark plugs.
- Attach the
SA9127E
adapter (1), hose (2) and compression gage (3) to a spark plug hole.
- Connect a tachometer.
- Connect the scan tool.
- Turn the ignition switch to the ON position.
- Using the scan tool, command the injectors all off.
- Depress the accelerator pedal to open the throttle fully.
- Crank the engine with the starter motor and measure the compression.
- Perform the measurement on each cylinder and compare the readings.
Specification
• | Compression pressure: minimum 990 kPa (145 psi) at 200 RPM |
• | Maximum compression variation: 200 kPa (28 psi) |
- If the compression is not within specifications, inspect for the following conditions and measure the compression again.
• | Improperly adjusted valves |
• | Improperly positioned timing belt and sprockets |
• | Damaged or worn valves or seats |
• | Damaged cylinder head gasket |
• | Damaged or worn piston rings |
• | Damaged or worn piston and cylinder bore |
- Using the scan tool, perform the PCM Reset Procedure to return the fuel injectors to normal operation.