Check compression pressure with engine at normal operating temperature. Unplug distributor and ignition coil. If equipped, unplug cold start injector connector, solenoid resistor, and fuel injector connectors. Remove all spark plugs, hold throttle valve wide open, and operate engine at cranking speed.
| Application | Specification | ||
|---|---|---|---|
| Compression Ratio | |||
| Camry & Celica | |||
| 3S-FE | 9.3:1 | ||
| 3S-GE | 9.2:1 | ||
| 3S-GTE | 8.5:1 | ||
| Corolla, FX & FX-16 | |||
| 4A-C | 9.0:1 | ||
| 4A-F | 9.5:1 | ||
| 4A-GE | 9.4:1 | ||
| Pickup & 4Runner | |||
| 22R & 22R-E | 9.3:1 | ||
| 22R-TE | 7.5:1 | ||
| MR2 | 9.4:1 | ||
| Tercel Sedan | 9.3:1 | ||
| Tercel Wagon | 9.0:1 | ||
| Van | 8.8:1 | ||
| Normal Compression Pressure | |||
| Corolla, FX & FX-16 | |||
| 4A-F | 191 psi (13.4 kg/cm 2 ) | ||
| 4A-C & 4A-GE | 178 psi (12.5 kg/cm 2 ) | ||
| Pickup & 4Runner | |||
| 22R & 22R-E | 171 psi (12.0 kg/cm 2 ) | ||
| 22R-TE | 149 psi (10.5 kg/cm 2 ) | ||
| Tercel Sedan | 185 psi (13.0 kg/cm 2 ) | ||
| All Others | 178 psi (12.5 kg/cm 2 ) | ||
| Minimum Compression Pressure | |||
| Corolla, FX & FX-16 | |||
| 4A-F & 4A-GE | 142 psi (10.0 kg/cm 2 ) | ||
| 4A-C | 128 psi (9.0 kg/cm 2 ) | ||
| Pickup & 4Runner | |||
| 22R & 22R-E | 142 psi (10.0 kg/cm 2 ) | ||
| 22R-TE | 121 psi (8.5 kg/cm 2 ) | ||
| All Others | 142 psi (10.0 kg/cm 2 ) | ||
| Maximum Variation | |||
| Between Cylinders | 14 psi (1.0 kg/cm 2 ) | ||
COMPRESSION SPECIFICATIONS