Engine Compression
Before performing compression test or cranking engine using remote starting switch, disconnect coil wire from distributor cap and secure to good ground. Check compression with engine warm, spark plugs removed and throttle wide open.
COMPRESSION SPECIFICATIONS
| Application | Specification | |||
|---|---|---|---|---|
| Compression Ratio | ||||
| 3.0L | 8.85:1 | |||
| 3.9L | 9.0:1 | |||
| Compression Pressure | ||||
| 3.0L | 178 psi (12.5 kg/cm2 ) @ 250 RPM | |||
| 3.9L | (1) 100 psi (7.03 kg/cm2 ) | |||
| Max. Variation Between Cylinders | 25% | |||
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