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Lincoln Master
17,989 Answers
- Posted on Jan 14, 2011
Re: Replace fuel inj 2009 lincoln ls 3.9 eng
Check this procedure about V8 3.9L Fuel Injectors - Removal & Installation
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Before servicing the vehicle, please familiarize yourself with safety procedures.
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Relieve fuel system pressure.
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Remove or disconnect the following:
Negative battery cable
Engine appearance covers
Fuel lines
Fuel pressure regulator
Fuel cross over elbow
Fuel injector connectors
Fuel injector clamping plates
Fuel injectors
To install:
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Install or connect the following:
Fuel injectors. Use new O-ring seals.
Fuel injector clamping plates
Fuel injector connectors
Fuel cross over elbow
Fuel pressure regulator
Fuel lines
Engine appearance covers
Negative battery cable
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Start the engine and check for leaks.
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Before servicing the vehicle, please familiarize yourself with safety procedures.
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Disconnect the negative battery cable.
CAUTION
The engine appearance cover is equipped with a noise suppressor.
If the noise suppressor becomes separated from the engine appearance
cover it must be positioned on the intake manifold prior to installing
the engine appearance cover.
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Remove the engine appearance cover and the noise suppressor, if detached.
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Remove the air cleaner outlet pipe.
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Release the fuel system pressure.
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Remove the four engine appearance cover mounting bracket nuts and the brackets.
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Disconnect the fuel pressure sensor electrical connector from the sensor.
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Disconnect the fuel pressure sensor vacuum connector from the sensor.
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Disconnect the eight fuel injector electrical connectors from the injectors.
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Disconnect the fuel temperature sensor electrical connector from the sensor.
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Disconnect the fuel supply tube retaining clip from the fuel injection supply manifold.
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Disconnect the fuel supply tube spring lock coupling.
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Remove the four bolts and the fuel injection supply manifold and fuel injectors as an assembly.
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Remove the fuel injectors from the fuel injection supply manifold.
CAUTION
Use O-ring seals that are made of special fuel-resistant material.
Use of ordinary O-ring seals can cause the fuel system to leak. Do not
reuse the O-ring seals.
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Remove and discard the 16 O-ring seals from the fuel injectors.
Fig. Exploded view of the fuel injector mounting-3.9L engine shown
To install:
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Lubricate the new fuel injector O-ring seals with clean engine oil before installing.
CAUTION
Use O-ring seals that are made of special fuel-resistant material.
Use of ordinary O-rings can cause the fuel system to leak. Do not reuse
the O-ring seals.
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Install sixteen new O-ring seals onto the fuel injectors.
Lubricate the O-ring seals with clean engine oil prior to installation.
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Install the fuel injectors and clips onto the fuel rail.
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Install the fuel rail and injectors as an assembly. Tighten the fuel rail bolts to 89 inch lbs. (10 Nm).
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Install the remaining components in the reverse order of removal.
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