ENGINE COMPRESSION
Warm engine to normal operating temperature. Check compression at cranking speed with throttle wide open and all spark plugs removed. Ensure crankcase is at correct level and oil is of correct viscosity. With compression gauge installed, use remote starter to crank engine.
Crank engine 5 revolutions (minimum) and record highest reading. Repeat procedure for all cylinders using approximately same number of revolutions. Lowest compression reading should not be less than 75 percent of highest compression reading. Cylinder compression readings should not be less than 100 psi (7 kg/cm 2 ).
| Application | Compression Ratio |
|---|---|
| 3.0L DOHC | 10.0:1 |
| 3.0L Except DOHC | 9.3:1 |
COMPRESSION RATIO SPECIFICATIONS
VALVE CLEARANCE
Note. Hydraulic valve lifters are used and valve adjustment is not required. If incorrect valve clearance is suspected, lifter must be collapsed before clearance can be checked.
| Application | In. (mm) |
|---|---|
| 3.0L Except DOHC | .085-.185 (2.16-4.70) |
| 3.0L DOHC | .019-.043 (0.50-1.11) |
COLLAPSED VALVE LIFTER CLEARANCE
IGNITION COIL
| Application | Primary (Ohms) | Secondary (Ohms) |
|---|---|---|
| 3.0L | (1) | (1) |
| (1) Resistance value is not available. For testing, refer CIRCUIT TEST JE in TESTS W/CODES article. | ||
| (1) | Resistance value is not available. For testing, refer CIRCUIT TEST JE in TESTS W/CODES article. |
IGNITION COIL RESISTANCE
SPARK PLUGS
| Application | Motorcraft No. |
|---|---|
| 3.0L DOHC | AWSF-32F |
| 3.0L Flexible Fuel (FF) | AWSFA-32C |
| 3.0L Except DOHC & FF | AWSF-32PP |
SPARK PLUG TYPE
| Application | Gap: In. (mm) | Torque: Ft. Lbs. (N.m) |
|---|---|---|
| DOHC | .052-.056 (1.32-1.42) | 7-15 (9-20) |
| Except DOHC | .042-.046 (1.07-1.17) | 7-15 (9-20) |
SPARK PLUG SPECIFICATIONS
Firing Order & Timing Mark (3.0L - VIN "U" & "2" Flex Fuel). Scheme 1
Scheme 2
Firing Order & Timing Marks (3.0L - VIN "S"). Scheme 3
Scheme 4
Ignition Timing
| Application | Degrees BTDC @ Idle |
|---|---|
| 3.0L | (1) 8-12 |
| (1) Disconnect single in-line SPOUT connector, or remove shorting bar from double-wire SPOUT connector. | |
| (1) | Disconnect single in-line SPOUT connector, or remove shorting bar from double-wire SPOUT connector. |
BASE IGNITION TIMING
FUEL PUMP
For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article.
IDLE SPEED & MIXTURE
Note. Idle mixture is not adjustable. If idle mixture is incorrect, see appropriate TESTS W/CODES article.
| Model | RPM |
|---|---|
| 3.0L (1) | (2) |
| (1) Idle speed is not adjustable. (2) Information not available. | |
| (1) | Idle speed is not adjustable. |
| (2) | Information not available. |
IDLE SPEED SPECIFICATIONS
THROTTLE POSITION (TP) SENSOR
| Throttle Angle | (1) Volts |
|---|---|
| 0° | .65 |
| 10° | .97 |
| 20° | 1.44 |
| 30° | 1.90 |
| 40° | 2.37 |
| 50° | 2.84 |
| 60° | 3.31 |
| 70° | 3.78 |
| 80° | 3.90 |
| (1) Values may vary by 15 percent. For testing, refer CIRCUIT TEST DH in TESTS W/CODES article. | |
| (1) | Values may vary by 15 percent. For testing, refer CIRCUIT TEST DH in TESTS W/CODES article. |
TP SENSOR SPECIFICATIONS