Engine Compression
Check engine compression with engine at normal operating temperature at specified cranking speed, all spark plugs removed and throttle wide open. The DME master relay and/or fuel pump relay MUST be pulled out for compression test. See ON-VEHICLE ADJUSTMENTS article for additional information.
COMPRESSION SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Compression Pressure | ||
| 6-Cylinder & V8 | 142-156 psi (10-11 kg/cm2 ) | |
| V12 | 156 psi (11 kg/cm2 ) | |