ENGINE COMPRESSION
Ensure battery is fully charged. Check engine compression with engine at normal operating temperature, at specified cranking speed, all spark plugs removed and throttle wide open.
| Application | Psi (kg/cm 2 ) |
|---|
| G20 |
| Standard | 185 (13.0) |
| Minimum | 156 (11.0) |
| Maximum Variation Between Cylinders | 14 (1.0) |
| Q45 |
| Standard | 186 (13.1) |
| Minimum | 144 (10.1) |
| Maximum Variation Between Cylinders | 14 (1.0) |
| (1) With engine at 300 RPM. |
| (1) | With engine at 300 RPM. |
COMPRESSION SPECIFICATIONS (1)
VALVE CLEARANCE
Note. All models are equipped with hydraulic lifters. No adjustment is required.
IGNITION COIL
| Application | Primary | Secondary |
|---|
| G20 | .8 | 16,000 |
| Q45 | (1) | (1) |
| (1) Information is not available from manufacturer. |
| (1) | Information is not available from manufacturer. |
IGNITION COIL RESISTANCE - Ohms @ 77°F (25°C)
SPARK PLUGS
| Application | NGK No. |
|---|
| G20 |
| Conventional | BKR6E |
| Platinum | PFR5G-11 |
| Q45 | PFR5G-11 |
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) |
|---|
| G20 |
| Conventional | .031-.035 (.80-.90) | 15-21 (20-29) |
| Platinum | .043 (1.10) | 15-21 (20-29) |
| Q45 | .043 (1.10) | 15-21 (20-29) |
SPARK PLUG SPECIFICATIONS
FIRING ORDER & TIMING MARKS
Note. For firing order (Scheme 1)or (Scheme 2). Q45 uses a distributorless ignition system. On Q45, adjustments to timing are made by rotating camshaft position sensor after loosening mounting bolts.
Firing Order (G20). Scheme 1
Scheme 1: Firing Order (G20)
Firing Order (Q45). Scheme 2
Scheme 2: Firing Order (Q45)
IGNITION TIMING
| Application | (1) Specification |
|---|
| G20 & Q45 | 13-17° BTDC |
| (1) With transmission in Neutral and no electrical load on engine. |
| (1) | With transmission in Neutral and no electrical load on engine. |
IGNITION TIMING (Degrees BTDC @ Idle)
FUEL PUMP
| Application | Psi (kg/cm 2 ) (1) | (2) psi (kg/cm 2 ) |
|---|
| G20 & 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 |
|---|
| G20 | 14-15 @ 68°F (20°C) |
| Q45 | 10-14 @ 77°F (25°C) |
INJECTOR RESISTANCE SPECIFICATIONS
IDLE SPEED
| Application | Idle RPM (1) | CO Level |
|---|
| G20 | 750-850 | (2) |
| Q45 | 600-700 | (2) |
| (1) With transmission in Neutral and no electrical load on engine. (2) See underhood emission decal for specification. |
| (1) | With transmission in Neutral and no electrical load on engine. |
| (2) | See underhood emission decal for specification. |
THROTTLE POSITION (TP) SENSOR
| Throttle Position | Volts |
|---|
| G20 |
| Fully Closed | .2-.8 |
| Fully Open | 3.5-4.5 |
| Q45 |
| Fully Closed | .15-.85 |
| Fully Open | 3.5-4.7 |
THROTTLE POSITION (TP) SENSOR OUTPUT VOLTAGE
| Secondary Throttle Valve Position | Ohms @ 77°F (25°C) |
|---|
| Fully Open | About 5000 |
| Partially Open | 600-4000 |
| Fully Closed | About 600 |
SECONDARY TP SENSOR RESISTANCE (Q45)
