ENGINE COMPRESSION
Check engine compression with engine at normal operating temperature at specified cranking speed, all spark plugs removed and throttle wide open.
| Application (1) | Specification |
|---|
| Compression Ratio |
| 2.4L (VIN G) | 8.5:1 |
| 3.0L (VIN H) | 8.9:1 |
| Compression Pressure |
| 2.4L (VIN G) | 171 psi (12.0 kg/cm 2 ) |
| 3.0L (VIN H) | 171 psi (12.0 kg/cm 2 ) |
| Maximum Variation Between Cylinders | 14 psi (1.0 kg/cm 2 ) |
| (1) See ENGINE/VIN ID article in this section for VIN information. |
| (1) | See ENGINE/VIN ID article in this section for VIN information. |
COMPRESSION SPECIFICATIONS
VALVE CLEARANCE
Note. These models do not require periodic valve adjustment.
IGNITION COIL
| Application | Primary | Secondary |
|---|
| 2.4L (VIN G) | .72-.88 | 10,300-13,900 |
| 3.0L (VIN H) | .72-.88 | 10,300-13,900 |
IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)
HIGH TENSION WIRE RESISTANCE - 2.4L (VIN G)
| Application (1) | Ohms |
|---|
| Coil Wire | 3000 |
| No. 1 Wire | 10,000 |
| No. 2 Wire | 12,000 |
| No. 3 Wire | 12,000 |
| No. 4 Wire | 14,000 |
| (1) See ENGINE/VIN ID article in this article for VIN information. |
| (1) | See ENGINE/VIN ID article in this article for VIN information. |
HIGH TENSION WIRE RESISTANCE - 2.4L (VIN G)
HIGH TENSION WIRE RESISTANCE - 3.0L (VIN H)
| Application (1) | Ohms |
|---|
| Coil Wire | 3000 |
| No. 1 Wire | 9000 |
| No. 2 Wire | 8500 |
| No. 3 Wire | 10,000 |
| No. 4 Wire | 9000 |
| No. 5 Wire | 12,000 |
| No. 6 Wire | 10,000 |
| (1) See ENGINE/VIN ID article in this article for VIN information. |
| (1) | See ENGINE/VIN ID article in this article for VIN information. |
HIGH TENSION WIRE RESISTANCE - 3.0L (VIN H)
SPARK PLUGS
| Application | Nippondenso No. |
|---|
| 2.4L (VIN G, 8 Valve) | W20EPR-11 |
| 2.4L (VIN G, 16 Valve) | K16EPR-11 |
| 3.0L (VIN H) | W16EPR-11 |
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) |
|---|
| All Models | .039-.043 (1.0-1.1) | 15-21 (20-30) |
SPARK PLUG SPECIFICATIONS
FIRING ORDER
| WARNING | On the 3.0L V6, the firing order and the spark plug connection order on the top of the distributor do not match. Circuits internal to the distributor cap differ from the external spark plug wire connections. This is intentional and is done to avoid spark plug wires crossover. (Scheme 2) |
| WARNING | On many models, improper arrangement of spark plug wires will cause miss firing and surge during high-speed operation. Ensure spark plug wires are routed as shown. |
Scheme 1
Scheme 1: Firing Order & Plug Wire Routing (2.4L SOHC)
Scheme 2
Scheme 2: Firing Order & Plug Wire Routing (3.0L)
IGNITION TIMING
| Application | (1) Basic | (2) (3) Actual |
|---|
| 2.4L | 3-7 @ 600-800 | 8 @ 600-800 |
| 3.0L |
| Montero | 3-7 @ 600-800 | 15 @ 600-800 |
| Pickup & Ram-50 | 3-7 @ 650-850 | 15 @ 650-850 |
| (1) With ignition timing adjustment connector grounded or vacuum hose (farthest from distributor) disconnected. (2) With ignition timing adjustment connector ungrounded or vacuum hose (farthest from distributor) connected. Ignition timing may fluctuate. (3) If vehicle altitude is more than 2300 ft. above sea level, actual timing may be advanced. |
| (1) | With ignition timing adjustment connector grounded or vacuum hose (farthest from distributor) disconnected. |
| (2) | With ignition timing adjustment connector ungrounded or vacuum hose (farthest from distributor) connected. Ignition timing may fluctuate. |
| (3) | If vehicle altitude is more than 2300 ft. above sea level, actual timing may be advanced. |
IGNITION TIMING (Degrees BTDC @ RPM)
FUEL PUMP
| Application | At Idle w/Vacuum psi (kg/cm 2 ) | At Idle w/o Vacuum psi (kg/cm 2 ) |
|---|
| All Models | 38 (2.6) | 47-50 (3.3-3.5) |
INJECTOR RESISTANCE
| Application | Ohms |
|---|
| All Models | 13-16 |
THROTTLE POSITION SENSOR (TPS)
| Application | (1) Volts |
|---|
| 2.4L | .48-.52 |
| 3.0L | .4-1.0 |
| (1) At idle. |
