Electronic Engine Controls- Gasoline Engines: Specifications Ford Econoline E250

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

The electronic engine controls consist of the following

1. Powertrain control module (PCM)
2. Throttle position (TP) sensor
3. Idle air control (IAC) valve
4. Camshaft position (CMP) sensor
5. Crankshaft position (CKP) sensor
6. Mass air flow (MAF) sensor
7. Intake air temperature (IAT) sensor
8. Heated oxygen sensor (HO2S) - front
9. Catalyst monitor sensor-rear
10. Knock sensor (KS)
11. Fuel rail pressure (FRP) sensor
12. Cylinder head temperature (CHT) sensor
13. Engine coolant temperature (ECT) sensor
14. Intake manifold runner control (IMRC) actuator
15. Output shaft speed (OSS) sensor

The PCM needs the following inputs to calibrate the engine correctly

1. Air temperature
2. Throttle position
3. Crankshaft position
4. Camshaft position
5. Engine rpm
6. Cylinder head temperature
7. Amount of engine detonation
8. Engine coolant temperature
9. Mass air flow
10. Fuel rail pressure

The TP sensor

1. Sends the PCM a signal indicating the throttle plate angle.
2. Is the main input to the PCM from the driver.

The IAC valve

1. Controls bypass air around the throttle plate at low speeds.
2. Is controlled by the PCM.

The ECT sensor

1. Provides the PCM a signal for coolant temperature.
2. Is mounted on top of the lower intake manifold.

The CMP sensor

1. Sends the PCM a signal indicating camshaft position used for fuel synchronization.

The CKP sensor

1. Sends the PCM a signal indicating crankshaft position.
2. Is essential for calculating spark timing.

The MAF sensor

1. Sends the PCM a signal indicating the temperature of the air entering the engine.
2. Sends the PCM a signal indicating mass air flow rate of air entering the engine.

The IAT sensor

1. Is repaired as an assembly with the MAF sensor.

The HO2S

1. Has the ability to create a voltage signal dependent on exhaust oxygen content.
2. Provides feedback information to the PCM used to calculate fuel delivery.

The catalyst monitor oxygen sensors

1. Monitor oxygen content after the catalytic converter.
2. Provide a voltage to the PCM used to calculate catalytic converter integrity.

The fuel rail pressure (FRP) sensor

1. Measures the pressure of the fuel in the fuel injection supply manifold and sends a signal to the PCM.
2. Uses intake manifold vacuum as a pressure reference.

The knock sensor (KS)

1. Is located in the intake valley (4.6L/5.4L/6.8L).
2. Sends a signal to the PCM indicating engine detonation.

The CHT sensor

1. Is mounted into the back of the left cylinder head and is not connected to any coolant passages.
2. Sends a signal to the PCM indicating the cylinder head temperature. If the temperature exceeds approximately 121 °C (260 °F), the PCM disables some fuel injectors. The PCM will alternate which fuel injectors are disabled every 24 engine cycles. The cylinders that are not being fuel injected act as air pumps to aid in cooling the engine. If the temperature exceeds approximately 166 °C (330 °F), the PCM disables all of the fuel injectors until the engine temperature drops below approximately 124°C (260 °F).

The OSS sensor

1. Is gear driven by the transmission.
2. Sends a signal to the PCM indicating transmission output shaft speed. For additional information, refer to «AUTOMATIC TRANSAXLE/TRANSMISSION-4R100»(ref-210155) or «AUTOMATIC TRANSAXLE/TRANSMISSION - 4R70W/4R75W»(ref-210156) .

Refer to the appropriate INTRODUCTION article.

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Scheme 24

1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-210181) .
2. Disconnect the camshaft position (CMP) sensor electrical connector.
3. Remove the bolt and the CMP sensor.
4. To install, reverse the removal procedure.

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Scheme 29

1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-210181) .
2. Raise and support the vehicle. For additional information, refer to «JACKING & LIFTING»(/ford/econoline-e250/1997-2012/remont/oem-general-information/#wheel-alignment-jacking-lifting) .
3. Remove the splash shield.
4. Remove the accessory drive belt from the A/C compressor pulley.
5. Disconnect and detach the crankshaft position (CKP) sensor electrical connector and position the wiring harness aside.
6. Detach the wiring harness from the bracket.
7. Disconnect the A/C compressor field coil electrical connector.
8. Loosen the bolts enough to slide the A/C compressor down one inch, allowing access for CKP sensor removal.
9. Remove the CKP sensor bolt and the crankshaft sensor.
10. To install, reverse the removal procedure.

Scheme 30

Scheme 31

1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-210181) .
2. Remove the air cleaner assembly. For additional information, refer to «INTAKE AIR DISTRIBUTION & FILTERING»(ref-210150) .
3. Disconnect the powertrain control module (PCM) electrical connector.
4. Remove the PCM. Remove the nuts. Remove the cover. Remove the PCM.
5. To install, reverse the removal procedure.

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Scheme 33

1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-210181) .
2. Remove the air cleaner outlet tube. For additional information, refer to «INTAKE AIR DISTRIBUTION & FILTERING»(ref-210150) .
3. Disconnect the throttle position (TP) sensor electrical connector.
4. Remove the screws and the sensor.
5. To install, reverse the removal procedure.

Scheme 34

1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-210181) .
2. Remove the air cleaner assembly. For additional information, refer to «INTAKE AIR DISTRIBUTION & FILTERING»(ref-210150) .
3. Remove the accelerator control snow shield.
4. Disconnect the idle air control (IAC) valve electrical connector and remove the bolts and the IAC valve.
5. To install, reverse the removal procedure.

Scheme 35

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Scheme 37

1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-210181) .
2. Remove the engine cover. For additional information, refer to «INTERIOR TRIM AND ORNAMENTATION»(ref-210204) .
3. Disconnect the idle air control (IAC) valve electrical connector.
4. Disconnect the throttle bypass hose.
5. Remove the two bolts and the IAC valve.
6. To install, reverse the removal procedure.

Scheme 38

1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-210181) .
2. Partially drain the cooling system. For additional information, refer to «ENGINE COOLING»(ref-210139) .
3. Remove the engine coolant temperature (ECT) sensor. Disconnect the connector. Remove the ECT sensor.
4. To install, reverse the removal procedure.

Scheme 39

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Scheme 41

1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-210181) .
2. Remove the air cleaner assembly. For additional information, refer to «INTAKE AIR DISTRIBUTION & FILTERING»(ref-210150) .
3. Open the air cleaner. Release the air cleaner clamp. Separate the inlet side from the outlet side of the air cleaner.
4. Remove the MAF assembly.
5. Disconnect the MAF sensor electrical connector.
6. Remove the nuts and separate the MAF sensor from the MAF sensor plate.
7. To install, reverse the removal procedure.

Scheme 42

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Scheme 44

1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-210181) .
2. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING & LIFTING»(/ford/econoline-e250/1997-2012/remont/oem-general-information/#wheel-alignment-jacking-lifting) .
3. Disconnect the heated oxygen sensor (HO2S) electrical connector.
4. Using the special tool, remove the HO2S.
5. To install, reverse the removal procedure.

Scheme 45

1. Remove the intake manifold. For additional information, refer to «ENGINE-4.6 & 5.4L»(ref-210135) or «ENGINE-6.8L»(ref-210138) .
2. Remove the knock sensor (KS). Disconnect the electrical connector. Remove the nut and the KS.
3. To install, reverse the removal procedure.

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Scheme 51

1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-210181) .
2. Remove the air cleaner and bracket assembly. For additional information, refer to «INTAKE AIR DISTRIBUTION & FILTERING»(ref-210150) .
3. Rotate the drive belt tensioner clockwise and remove the drive belt from the generator pulley.
4. Remove the bolts retaining the upper intake plenum to the generator mounting bracket.
5. Remove the lower mounting bolts and position the generator aside.
6. Disconnect the intake manifold-tuning valve (IMTV) connector.
7. Disconnect the cylinder head temperature (CHT) sensor electrical connector.
8. Remove the CHT sensor.
9. To install, reverse the removal procedure.

See also:
• JACKING & LIFTING