ENGINE COMPRESSION
Check engine compression at normal operating temperature at specified cranking speed. Release fuel pressure, and disconnect coil wire at distributor. Remove all spark plugs, and hold throttle wide open.
Note. On Q45, remove air duct and harness connector bracket from left bank. Also remove ornament cover from cylinder head to access ignition coil and spark plug wires.
VALVE CLEARANCE
Note. All vehicles are equipped with hydraulic lifters. No adjustments are required.
IGNITION COIL
| Application | Primary | Secondary |
|---|
| G20 & M30 | 1.0 | 10,000 |
| Q45 | 0.7 | 8000 |
IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)
DISTRIBUTOR SENSORS
| Application | (1) Fluctuating Voltage |
|---|
| All Models | Between 5 And 0 |
| (1) Rotate crank angle sensor slowly by hand. Includes sub-crank angle sensor on Q45. |
| (1) | Rotate crank angle sensor slowly by hand. Includes sub-crank angle sensor on Q45. |
HIGH TENSION WIRE RESISTANCE
| Application | Ohms |
|---|
| G20 & M30 | 30,000 Maximum |
| (1) Not applicable to Q45 distributorless ignition system. |
| (1) | Not applicable to Q45 distributorless ignition system. |
HIGH TENSION WIRE RESISTANCE (1)
SPARK PLUGS
| Application | NGK No. |
|---|
| All Models | PFR6B-11 |
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) |
|---|
| All Models | .039-.043 (1.00-1.10) | 14-22 (20-29) |
SPARK PLUG SPECIFICATIONS
FIRING ORDER & TIMING MARKS
Note. For firing order (Scheme 1)- (Scheme 3). Q45 uses a distributorless ignition system. Firing order for Q45 is controlled by ECU through left and right power transistors. Adjustments to timing are not possible.
Firing Order (G20). Scheme 1
Scheme 1: Firing Order (G20)
Firing Order & Timing Marks (M30). Scheme 2
Scheme 2: Firing Order & Timing Marks (M30)
Firing Order (Q45). Scheme 3
Scheme 3: Firing Order (Q45)
IGNITION TIMING
| Application | Specification |
|---|
| G20 | (1) 13-17 @ 700-800 |
| M30 | (2) 13-17 @ 750-850 |
| Q45 | (2) 13-17 @ 600-700 |
| (1) With Consult Tester (J-38465) in IGN TIMING ADJ in WORK SUPPORT mode or with throttle position sensor harness connector disconnected (A/T in Neutral). Adjust ignition timing by rotating distributor. (2) Transmission in Neutral and no load on engine. Adjust ignition timing by rotating crank angle sensor. |
| (1) | With Consult Tester (J-38465) in IGN TIMING ADJ in WORK SUPPORT mode or with throttle position sensor harness connector disconnected (A/T in Neutral). Adjust ignition timing by rotating distributor. |
| (2) | Transmission in Neutral and no load on engine. Adjust ignition timing by rotating crank angle sensor. |
IGNITION TIMING (Degrees BTDC @ RPM)
FUEL PUMP
| Application | (1) psi (kg/cm 2 ) | (2) psi (kg/cm 2 ) |
|---|
| G20 | 36 (2.5) | 43 (3.0) |
| M30 & Q45 | 34 (2.4) | 43 (3.0) |
| (1) With vacuum hose connected at fuel pressure regulator. (2) With vacuum hose disconnected at fuel pressure regulator. |
| (1) | With vacuum hose connected at fuel pressure regulator. |
| (2) | With vacuum hose disconnected at fuel pressure regulator. |
INJECTOR RESISTANCE
| Application | Ohms |
|---|
| All Models | 10-14 |
INJECTOR RESISTANCE SPECIFICATIONS
IDLE SPEED
| Application | RPM |
|---|
| G20 | (1) 700-800 |
| M30 | (2) 750-850 |
| Q45 | (2) 600-700 |
| (1) With Consult Tester (J-38465) in IGN TIMING ADJ in WORK SUPPORT mode or with throttle position sensor harness connector disconnected (A/T in Neutral). Adjust idle speed by turning adjustment screw on AAC valve. (2) With Consult Tester (J-38465) in DATA MONITOR mode or with transmission in Neutral and no load on engine. Adjust idle speed by selecting AAC VALVE ADJ in WORK SUPPORT mode or by disconnecting AAC valve harness connector. Turn adjustment screw on AAC valve. Adjust idle speed to 700 RPM on M30 and 575-625 RPM on Q45. |
| (1) | With Consult Tester (J-38465) in IGN TIMING ADJ in WORK SUPPORT mode or with throttle position sensor harness connector disconnected (A/T in Neutral). Adjust idle speed by turning adjustment screw on AAC valve. |
| (2) | With Consult Tester (J-38465) in DATA MONITOR mode or with transmission in Neutral and no load on engine. Adjust idle speed by selecting AAC VALVE ADJ in WORK SUPPORT mode or by disconnecting AAC valve harness connector. Turn adjustment screw on AAC valve. Adjust idle speed to 700 RPM on M30 and 575-625 RPM on Q45. |
IDLE SPEED SPECIFICATIONS (1)
THROTTLE POSITION SENSOR
| Application | (1) Volts |
|---|
| G20 | 0.45-4.00 |
| M30 & Q45 | 0.40-4.00 |
| (1) Voltage variation from closed throttle (idle) to wide open throttle. |
| (1) | Voltage variation from closed throttle (idle) to wide open throttle. |
THROTTLE POSITION SENSOR SPECIFICATIONS
