ENGINE COMPRESSION
Check engine compression with engine at normal operating temperature, all spark plugs removed (on dual plugs, remove exhaust side only), and throttle wide open. Ensure crankcase is full and oil is of correct viscosity. With compression gauge installed, use remote starter to crank engine.
Crank engine at least 5 revolutions, 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. No cylinder compression reading should be less than 100 psi (7 kg/cm 2 ).
| Application | Compression Ratio |
|---|---|
| 5.4L | (1) |
| (1) Information not available. | |
| (1) | Information not available. |
COMPRESSION RATIO SPECIFICATIONS
VALVE CLEARANCE
Note. All models are equipped with hydraulic valve lifters; valve adjustment is not required. If incorrect valve clearance is suspected, collapse lifter before checking clearance.
| Application | In. (mm) |
|---|---|
| 5.4L | .034-.018 (0.85-0.45) |
COLLAPSED VALVE LIFTER CLEARANCE
HIGH TENSION WIRE RESISTANCE
| Application | Ohms |
|---|---|
| 5.4L | 7000 Per Foot |
HIGH TENSION WIRE RESISTANCE
SPARK PLUGS
Note. See vehicle emissions information decal for spark plug gap specification.
| Application | Motorcraft No. |
|---|---|
| 5.4L | AWSF-22E |
SPARK PLUG TYPE
| Application | Gap - In. (mm) | Torque - Ft. Lbs. (N.m) |
|---|---|---|
| 5.4L | .052-.056 (1.30-1.40) | 7-15 (9-20) |
SPARK PLUG SPECIFICATIONS
Identifying Firing Order & Timing Marks (5.4L - Light-Duty Emissions). Scheme 1
Scheme 2
IGNITION TIMING
| Application | Degrees BTDC |
|---|---|
| 5.4L | (1) 8-10 |
| (1) With SPOUT in-line connector unplugged. | |
| (1) | With SPOUT in-line connector unplugged. |
BASE IGNITION TIMING
FUEL PUMP
Note. Fuel pump performance is a measurement of fuel pressure and volume availability, not regulated fuel pressure.
For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article.
| Application | Specification |
|---|---|
| Fuel Line Pressure | (1) |
| Fuel Volume | (2) |
| (1) For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article. (2) Volume is one pt. (.5L) in 30 seconds. | |
| (1) | For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article. |
| (2) | Volume is one pt. (.5L) in 30 seconds. |
FUEL PRESSURE SPECIFICATIONS
IDLE SPEED & MIXTURE
Note. Idle mixture is not adjustable. If idle mixture is incorrect, see TESTS W/CODES article.
| Application | RPM |
|---|---|
| 5.4L | (1) |
| (1) Idle speed is computer controlled and is not adjustable. | |
| (1) | Idle speed is computer controlled and is not adjustable. |
IDLE RPM SPECIFICATION
THROTTLE POSITION (TP) SENSOR
Note. Throttle Position (TP) sensor is not serviceable. If TP sensor service is required, see CIRCUIT TEST DH in TESTS W/CODES article.
| Throttle Angle | (1) Voltage |
|---|---|
| 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 OUTPUT