ENGINE COMPRESSION
Check engine compression with engine at normal operating temperature at specified cranking speed, all spark plugs removed and throttle wide open.
| Application | Specification |
|---|
| Compression Ratio | 9.4:1 |
| Compression Pressure | 178 psi (1227 kPa) |
| Minimum Compression Pressure | 100 psi (689 kPa) |
| Maximum Variation Between Cylinders | 25% |
COMPRESSION SPECIFICATIONS
VALVE CLEARANCE
Note. Hydraulic lifters used. No adjustments are required.
IGNITION COIL
| Application | Primary | Secondary |
|---|
| 2.5L | .60-.80 | 12,000-18,000 |
IGNITION COIL RESISTANCE - Ohms @ 70°F (21°C)
HIGH TENSION WIRE RESISTANCE
| Application | Ohms |
|---|
| 2.5L | (1) |
| (1) Resistance should be 250-560 ohms per one inch, or 3000-6700 ohms per 12 inches. |
| (1) | Resistance should be 250-560 ohms per one inch, or 3000-6700 ohms per 12 inches. |
HIGH TENSION WIRE RESISTANCE
SPARK PLUGS
| Application | Champion No. |
|---|
| 2.5L | RC10PYP4 |
| (1) Check spark plug application on underhood vehicle emission control label. If application differs from application listed, use application on underhood vehicle emission control label. |
| (1) | Check spark plug application on underhood vehicle emission control label. If application differs from application listed, use application on underhood vehicle emission control label. |
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) |
|---|
| 2.5L | .039-.043 (1.00-1.10) | 20 (27) |
| (1) Check spark plug gap specification on underhood vehicle emission control label. If specification differs from that listed above, use specification on underhood vehicle emission control label. |
| (1) | Check spark plug gap specification on underhood vehicle emission control label. If specification differs from that listed above, use specification on underhood vehicle emission control label. |
SPARK PLUG SPECIFICATIONS (1)
Scheme 3
Scheme 3: FIRING ORDER & TIMING MARKS
IGNITION TIMING
| Application | Specification |
|---|
| Convertible | (1) |
| (1) Ignition timing is controlled by Powertrain Control Module (PCM) and is nonadjustable. DO NOT attempt to adjust ignition timing. |
| (1) | Ignition timing is controlled by Powertrain Control Module (PCM) and is nonadjustable. DO NOT attempt to adjust ignition timing. |
IGNITION TIMING (Degrees BTDC @ RPM)
FUEL PUMP
| Application | Pressure - psi (kPa) |
|---|
| 2.5L | (1) 47-51 (324-351) |
| (1) Manufacturer lists fuel pressure with engine off, ignition on and using scan tool to activate fuel pump. |
| (1) | Manufacturer lists fuel pressure with engine off, ignition on and using scan tool to activate fuel pump. |
INJECTOR RESISTANCE
| Application | Ohms |
|---|
| Convertible | 12 |
INJECTOR RESISTANCE SPECIFICATIONS - Ohms @ 68°F (20°C)
IDLE SPEED & MIXTURE
| Application | (1) Idle RPM | CO Level |
|---|
| Convertible | (2) | (3) |
| (1) Check idle speed with transaxle in Park (A/T) or Neutral (M/T) and all accessories off. (2) Idle speed is controlled by Powertrain Control Module. No adjustment is required. Only throttle body minimum airflow idle speed may be checked. (3) Information not available at time of publication. |
| (1) | Check idle speed with transaxle in Park (A/T) or Neutral (M/T) and all accessories off. |
| (2) | Idle speed is controlled by Powertrain Control Module. No adjustment is required. Only throttle body minimum airflow idle speed may be checked. |
| (3) | Information not available at time of publication. |
THROTTLE BODY MINIMUM AIRFLOW IDLE SPEED
| Application | RPM |
|---|
| 1000 Miles Or Less | (2) 450-1100 |
| More Than 1000 Miles | (2) 500-1100 |
| (1) Specification listed in accordance with vehicle mileage. (2) Specs listed with Air Metering Fitting (6457) installed. |
| (1) | Specification listed in accordance with vehicle mileage. |
| (2) | Specs listed with Air Metering Fitting (6457) installed. |
THROTTLE BODY MIN. AIRFLOW IDLE SPEED SPECS (1)
THROTTLE POSITION SENSOR
| Throttle Opening | (1) (2) Volts |
|---|
| At Idle | Greater Than .6 |
| At Full Throttle | Less Than 4.5 |
| (1) Measure voltage at center terminal on throttle position sensor with ignition on. (2) Voltage should smoothly increase when moving throttle from idle to full throttle. |
| (1) | Measure voltage at center terminal on throttle position sensor with ignition on. |
| (2) | Voltage should smoothly increase when moving throttle from idle to full throttle. |
THROTTLE POSITION SENSOR VOLTAGE SPECS
