Engine Compression
Ensure battery is fully charged. Warm engine to normal operating temperature. Disconnect wire at ignition coil to prevent engine from starting. Check engine compression with all spark plugs removed and throttle wide open.
COMPRESSION SPECIFICATIONS
| Application | Specification | |||
|---|---|---|---|---|
| Normal Compression Pressure | ||||
| All Models | (1) | |||
| Minimum Compression Pressure | ||||
| 4.7L | (1) | |||
| 3.9L & 5.9L | 100 psi (689.5 kPa) | |||
| Maximum Variation Between Cylinders | ||||
| All Models | (1) | |||
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