Compression pressure check

Warm up the engine to normal operating temperature.
Remove the fuel pump fuse(15A).
Wait until the engine stopped.
Remove the ignition coils and spark plugs.
Crank the engine to remove any foreign material in the cylinders.
Put a compression pressure gauge into spark plug hole.
Check compression pressure at each cylinder.
Specification: Approx. 15kg/cm²
Is compression pressure for each cylinder displayed within specifications?
YES
- Go to "IGNITION SYSTEM CHECK " procedure.
NO
- Add a small amount of oil through the spark plug hole, and repeat above steps. If the addition of oil causes the compression to rise, the cause is a worn or damaged piston ring or cylinder inner surface.
- If the compressions at each cylinders are not same or not simular, a burnt or defective valve seat, worn head gasket and pressure rings can be the cause of vibration of engine. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.