ENGINE COMPRESSION
Warm engine to normal operating temperature. Disconnect single wire from negative terminal of ignition coil(s). Check compression with all spark plugs removed, throttle valve wide open and at normal cranking speed (250-300 RPM).
| CAUTION | Failure to disconnect ignition coil(s) negative terminal may cause damage to ECU. |
| Application | Specification | ||
|---|---|---|---|
| Compression Ratio | |||
| C70, S70 & V70 | |||
| Non-Turbo | 10.3:1 | ||
| High Pressure Turbo | 8.5:1 | ||
| Low Pressure Turbo | 9.0:1 | ||
| S90 & V90 | 10.7:1 | ||
| Compression Pressure (Minimum) | |||
| C70, S70 & V70 | |||
| Non-Turbo | 184-219 psi (13-15 kg/cm 2 ) | ||
| Turbo | 156-184 psi (11-13 kg/cm 2 ) | ||
| S90 & V90 | 170-199 psi (12-14 kg/cm 2 ) | ||
COMPRESSION SPECIFICATIONS
VALVE CLEARANCE
Note. All models use hydraulic lifters. No adjustment is required.
IGNITION TIMING
Ignition timing is computer-controlled and is not adjustable.
| Application | Timing | |
|---|---|---|
| C70, S70 & V70 | ||
| Non-Turbo | 10 @ 800 | |
| Turbo | 4-8 @ 850 | |
| S90 & V90 | 5 @ 750 | |
IGNITION TIMING (Degrees BTDC @ RPM)
IDLE SPEED & MIXTURE
Note. Cold (fast) idle is computer-controlled. Basic idle speed is not adjustable.
IDLE SPEED & CO LEVEL
| Application | Idle RPM | (2) CO Level |
|---|---|---|
| C70, S70 & V70 | (3) 850 | (3) .2-1.0% |
| S90 & V90 | 750 | .2-1.0% |
| (1) Idle speed can only be checked, not adjusted. On C70, S70 & V70, CO level can only be checked. For S80 & V90 CO adjustment, see ADJUSTMENTS article. (2) Measured upstream of catalytic converter with oxygen sensor connected. (3) With cooling fan on. | ||
| (1) | Idle speed can only be checked, not adjusted. On C70, S70 & V70, CO level can only be checked. For S80 & V90 CO adjustment, see ADJUSTMENTS article. |
| (2) | Measured upstream of catalytic converter with oxygen sensor connected. |
| (3) | With cooling fan on. |
IDLE SPEED & CO LEVEL (1)
THROTTLE POSITION SENSOR (TPS)
Note. TPS is not adjustable.
THROTTLE LINK ROD
- Loosen throttle link lock nut so link is separated and can spring back easily to its innermost position. Mount link in position.
- Attach link end with ball and lock nut to throttle spindle. Ensure throttle spindle is in contact with adjusting screw "B" and pulley is seated against idle stop "C". Tighten throttle link lock nut "A". Rotate pulley to ensure link seats against adjusting screw "B" before pulley seats against idle stop "C". (Scheme 2)
Scheme 2
THROTTLE CABLE
Throttle pulley should move freely without sticking. Cable should be taut in idling position, without altering pulley position. Pulley should rest against idle stop. (Scheme 3) Adjust cable as necessary. Press accelerator pedal to floor and ensure pulley reaches full-load stop.
Scheme 3
BASIC THROTTLE SETTING
Note. Basic throttle setting for S90 & V90 is not adjustable.
C70, S70 & V70
Loosen basic throttle setting adjustment screw lock nut. (Scheme 4) Turn screw until throttle is completely closed. On C70, S70 and V70, tighten adjustment screw until it touches throttle lever and then turn an additional 1/2 turn. On all models, tighten lock nut, making sure not to change adjustment. Recheck basic throttle setting.
