Compression Pressure
With engine at normal operating temperature, remove fuel lines from number one injector. Remove injector and install adaptor and pressure gauge from Kit (J 9531-01). Use a spare fuel line and fabricate a jumper connection between fuel inlet and return passages. Start engine and run at 600 RPM. Note and record compression pressure. Pressure reading must not exceed 25 psi between cylinders. Repeat procedure for remaining cylinders.
| Minimum Compression (PSI) |
Altitude (Ft.) |
| 540 |
0 |
| 500 |
2, 500 |
| 465 |
5, 000 |
| 430 |
7, 500 |
| 395 |
10, 000 |