Engine Compression
When making compression checks, disconnect the ignition switch connector Pink wire from high energy ignition system. With air cleaner removed and throttle and choke wide open, crank engine through at least 4 compression strokes.
COMPRESSION SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Compression Ratio | ||
| 2.8L | 8.5:1 | |
| 4.3L | 9.3:1 | |
| Minimum Pressure | 100 psi (7.0 kg/cm2 ) | |
| Maximum Pressure Variation | 30% | |