Engine Compression
On models equipped with Direct Ignition Systems (DIS), disconnect battery terminal connector from coil. On 2.3L models, Integrated Direct Ignition (IDI) cover and 11-pin IDI harness connector should be removed. On other models, disconnect battery terminal connector from distributor.
Check compression pressure with engine warm, all spark plugs removed and throttle valve wide open. Crank engine through 6 compression strokes before reading compression gauge.
COMPRESSION SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Compression Ratio | ||
| 2.0L (VIN K) | 8.8:1 | |
| 2.0L (VIN M) | 8.0:1 | |
| 2.0L (VIN 1) | 9.0:1 | |
| 2.3L (VIN A) | 10.0:1 | |
| 2.3L (VIN D) | 9.5:1 | |
| 2.5L (VIN R & U) | 8.3:1 | |
| Compression Pressure (All Engines) | 100 psi (7 kg/cm2 ) min. | |
| Max. Variation Between Cylinders | Less than 30% | |