RX7 2RTR-1308cc 1.3L MFI (1991)
Compression Check: Testing and Inspection
Compression Check
1. Check that the battery is fully charged. Recharge it if necessary.
2. Warm up the engine to the normal operating temperature, then stop it.
3. Allow about 10 minutes for the exhaust manifold to cool.
4. Remove the front and rear trailing-side spark plugs.
5. Disconnect the crank angle sensor connector.
6. Connect the SST to the front rotor housing and the battery.
7. Fully depress the accelerator pedal and crank the engine for 5 to 10 seconds.
8. Record the compression of the three combustion chambers and cranking speed.
Compression:
589 kPa (6.0 kgf/cm2, 85 psi)-250 rpm.
Differential limit between chambers:
147 kPa (1.5 kgf/cm2, 21 psi)-250 rpm.
