Fuel System & Engine Control System - 3.0L (2V): Other Ford Taurus IV рестайлинг

Sequential Multiport Fuel Injection (SFI)

The sequential multiport fuel injection (SFI) system is classified as

1. multi-point
2. pulse time
3. mass airflow

Fuel is metered into each intake port in a sequential firing order. Fuel injectors pulse to follow engine firing order in accordance with engine demand on a tuned intake manifold.

The basic fuel requirement of the engine is determined from the data supplied to the powertrain control module (PCM) by the mass air flow (MAF) sensor, which measures the amount of air being drawn into the engine.

Other sensors are used to measure

1. air temperature
2. engine coolant temperature
3. engine speed
4. exhaust oxygen content

The various sensors detect any changes in the operating conditions and send signals to the powertrain control module. This permits the powertrain control module to control the opening duration (pulse width) of the fuel injectors and maintain optimum exhaust emission control and engine performance for all operating conditions.

Throttle Body

The throttle body

1. controls throttle position by a conventional cable through throttle linkage.
2. controls air supply to the upper intake manifold by positioning the throttle plate.
3. is not adjustable.
4. cannot be cleaned.

Fuel Injectors

The fuel injector

1. uses replaceable O-rings.
2. is electronically operated by the powertrain control module (PCM).
3. has an internal solenoid that opens a needle valve to inject fuel into the lower intake manifold.
4. atomizes the fuel as the fuel is delivered.
5. is deposit resistant.

Fuel Injection Supply Manifold

The fuel injection supply manifold

1. receives fuel from the fuel supply line.
2. delivers fuel to the fuel injectors.

For removal and installation, refer to FUEL INJECTION SUPPLY MANIFOLD AND FUEL INJECTOR .

Fuel Charging and Controls

See INTRODUCTION - GASOLINE .

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1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-233724) .
2. Remove the air cleaner outlet tube. For additional information, refer to «INTAKE AIR DISTRIBUTION & FILTERING»(ref-233699) .
3. Remove the pin-type retainers and the snow shield.
4. Disconnect the accelerator cable, speed control cable and throttle return spring from the throttle body.
5. Remove the bolts and position the accelerator cable bracket aside.
6. Disconnect the throttle position (TP) sensor electrical connector.
7. Remove the throttle body. Remove the throttle body retaining bolts. Remove the throttle body.
8. Remove and discard the throttle body gasket.
9. To install, reverse the removal procedure.
10. Clean all sealing surfaces and install a new throttle body gasket.

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1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING & LIFTING»(ref-233684) .
2. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-233724) .
3. Remove the cowl vent screen and the RH cowl extension. For additional information, refer to «FRONT END BODY PANELS»(ref-233729) .
4. Remove the bolt from the engine control sensor wire harness ground connections.
5. Loosen the bolt and disconnect the powertrain control module (PCM).
6. Remove the upper intake manifold. For additional information, refer to «ENGINE - 3.0L (2V)»(ref-233691) .
7. Disconnect the evaporative emissions (EVAP) canister purge valve electrical connector.
8. Disconnect the oxygen sensor electrical connector.
9. Disconnect the fuel injector electrical connectors.
10. Disconnect the differential pressure feedback exhaust (DPFE) gas recirculation system valve electrical connector.
11. Disconnect the generator electrical connectors.
12. Disconnect the A/C cutout switch electrical connector.
13. Disconnect the ignition coil electrical connector.
14. Disconnect the following electrical connectors: camshaft position (CMP) sensor engine oil pressure sender engine coolant temperature (ECT) sensor
15. Disconnect the output shaft speed sensor (OSS) electrical connector.
16. Disconnect the 42-pin engine harness connector and the transmission solenoid connector.
17. Disconnect the oxygen sensor electrical connectors.
18. Disconnect the A/C compressor clutch electrical connector.
19. Disconnect the starter motor. For additional information, refer to «STARTING SYSTEM»(ref-233698) .
20. For flexible fuel engines, disconnect the secondary air induction electrical connector.
21. Remove the engine control sensor wire harness from the engine.
22. To install, reverse the removal procedure.

Material

MATERIAL SPECIFICATION

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Scheme 24

1. Remove the upper intake manifold. For additional information, refer to «ENGINE - 3.0L (2V)»(ref-233691) .
2. Disconnect the fuel tube spring lock couplings. For additional information, refer to «FUEL SYSTEM-GENERAL INFORMATION»(ref-233735) .
3. Disconnect the fuel injection pressure (IPR) sensor electrical and vacuum connectors.
4. Disconnect the fuel electrical connectors.
5. Remove the bolts and the fuel injection supply manifold.
6. Remove the fuel injectors from the fuel injection supply manifold.
7. Inspect the O-ring seals from each fuel injector. Install new O-ring seals as needed.
8. To install, reverse the removal procedure.