ENGINE COMPRESSION
| Application | Specification |
|---|
| Compression Ratio | 9.5:1 |
| Compression Pressure (1) |
| Standard | 199 psi (14.0 kg/cm 2 ) |
| Limit | (2) 170 psi (11.9 kg/cm 2 ) |
| (1) Checked at 400 RPM. (2) Maximum variation between cylinders is 14.2 psi (.9 kg/cm 2 ). |
| (2) | Maximum variation between cylinders is 14.2 psi (.9 kg/cm 2 ). |
COMPRESSION SPECIFICATIONS
VALVE ARRANGEMENT
Note. Right and left sides refer to engine, as viewed from flywheel.
Right Side
Left Side
IGNITION COIL
| Application | Primary | Secondary |
|---|
| X-90 | 0.7-0.9 | 13,000-18,000 |
IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)
DISTRIBUTOR SENSORS
| Application | In. (mm) |
|---|
| X-90 | (2) |
| (1) Also referred to as Camshaft Position (CMP) sensor air gap. (2) Not adjustable. |
| (1) | Also referred to as Camshaft Position (CMP) sensor air gap. |
| Application | Specification |
|---|
| X-90 | Information Not Available |
| (1) Also referred to as Camshaft Position (CMP) sensor. |
| (1) | Also referred to as Camshaft Position (CMP) sensor. |
PICK-UP COIL RESISTANCE (1)
HIGH TENSION WIRE RESISTANCE
| Application | Ohms |
|---|
| X-90 | 3000-6700 Per Foot |
HIGH TENSION WIRE RESISTANCE
SPARK PLUGS
| Application | Nippondenso | NGK |
|---|
| X-90 | K20PR-U | BKR6E |
| Application | Gap: In. (mm) | Torque: Ft. Lbs. (N.m) |
|---|
| X-90 | .028-.031 (.7-.8) | 20.5 (28) |
SPARK PLUG SPECIFICATIONS
Firing Order & Distributor Rotation. Scheme 1
Scheme 1: Firing Order & Distributor Rotation
IGNITION TIMING
| Application | Man. Trans. | Auto. Trans. |
|---|
| X-90 | (2) 4-6 @ 800 | (2) 4-6 @ 800 |
| (1) (Scheme 2)for timing mark location. (2) With jumper wire installed between terminals "D" and "E" of test connector located near coolant recovery bottle. (Scheme 3) |
| (2) | With jumper wire installed between terminals "D" and "E" of test connector located near coolant recovery bottle. (Scheme 3) |
IGNITION TIMING (Degrees BTDC @ RPM) (1)
Note. Ensure ignition timing advances as engine speed increases.
Scheme 2
Scheme 3
FUEL PUMP
Note. Fuel pump performance measures fuel pressure and volume availability, not regulated fuel pressure.
| Application | (1) psi (kg/cm 2 ) |
|---|
| X-90 | (2) 35.6-42.7 (2.5-3.0) |
| (1) Key on and engine off. (2) Pressure should maintain at least 25.6 psi (1.8 kg/cm 2 ) for one minute after fuel pump is turned off. |
| (1) | Key on and engine off. |
| (2) | Pressure should maintain at least 25.6 psi (1.8 kg/cm 2 ) for one minute after fuel pump is turned off. |
| Application | (1) psi (kg/cm 2 ) |
|---|
| X-90 | (2) 30.0-37.0 (2.1-2.6) |
| (1) With engine idling. (2) Pressure should maintain at least 25.6 psi (1.8 kg/cm 2 ) for one minute after fuel pump is turned off. |
| (2) | Pressure should maintain at least 25.6 psi (1.8 kg/cm 2 ) for one minute after fuel pump is turned off. |
INJECTOR RESISTANCE
| Application | Ohms |
|---|
| X-90 | 12.0-17.0 |
INJECTOR RESISTANCE SPECIFICATIONS
IDLE SPEED
| Application | Idle RPM |
|---|
| A/C Off | 750-850 |
| A/C On | 950-1050 |
| (1) Transmission in Neutral or Park. |
| (1) | Transmission in Neutral or Park. |
IDLE SPEED SPECIFICATIONS (1)
| Application | (2) Percent |
|---|
| X-90 | 50 |
| (1) See IDLE SPEED SPECIFICATIONS table. (2) With A/C turned off (if equipped). |
| (1) | See IDLE SPEED SPECIFICATIONS table. |
| (2) | With A/C turned off (if equipped). |
IAC DUTY AT SPECIFIED IDLE SPEED (1)
THROTTLE POSITION (TP) SENSOR
| Application | Ohms |
|---|
| Between Terminals "A" & "B" |
| With .020" (.50 mm) Clearance At Stop Screw | 0-500 |
| With .031" (.80 mm) Clearance At Stop Screw | Infinity |
| Between Terminals "A" & "D" | 3500-6500 |
| Between Terminals "A" & "C" |
| At Idle | 300-2000 |
| At Wide Open Throttle | (2) 2000-6500 |
| (1) (Scheme 4)for terminal identification. (2) There should be more than 2000 ohms difference between idle and wide open throttle resistance. |
| (2) | There should be more than 2000 ohms difference between idle and wide open throttle resistance. |
THROTTLE POSITION (TP) SENSOR RESISTANCE (1)
Note. See PIN VOLTAGE CHARTS article and appropriate wiring diagrams in WIRING DIAGRAMS article for PCM connector and wire terminal identification.
Scheme 4
