How to Perform a Compression Test

[White87GT]

1. WARM UP AND STOP ENGINE.

Allow the engine to warm up to normal operating temperature.

2. REMOVE IGNITION COIL

3. REMOVE SPARK PLUG

4. INSPECT CYLINDER COMPRESSION PRESSURE

4.. Insert a compression gauge into the spark plug hole.

4b. Fully open the throttle.

4c. While cranking the engine, measure the compression pressure. NOTE: Always use a fully charged battery to obtain engine speed of 250 rpm or more.

4d. Repeat steps a. through c. for each cylinder.

NOTE: This measurement must be done in as short a time as possible.

Posted at Celica.net by QuietDucks

[blck87gtconv]

Instead of removing the ignition coil, just pull the EFI main fuse, and you're good to go. To open the throttle, just depress the gas pedal to the floor.