Ameer Randolph
If you're looking to replace the fuel injectors in your 09 Mini Cooper S, you'll need to relieve the pressure within the fuel rail by briefly running the engine with the fuel pump fuse out. You'll also need to remove the upper plenum on the intake manifold, along with any cables, hoses, or wiring that restricts access. The supply and return lines are then removed from the fuel rail, and the electrical connectors to each fuel injector are unlocked and removed. The fuel rail is then unbolted and removed from the intake manifold. Finally, the injector(s) requiring replacement are removed from the fuel rail, taking care to not allow any debris to enter the exposed openings.
| Characteristics | Values |
|---|---|
| Step 1 | Remove the supply and return lines from the fuel rail |
| Step 2 | Unlock and remove the electrical connectors to each fuel injector |
| Step 3 | Unbolt and remove the fuel rail from the intake manifold |
| Step 4 | Remove the injector(s) requiring replacement from the fuel rail, taking care to not allow any debris to enter the exposed openings |
| Step 5 | Relieve the pressure within the fuel rail by briefly running the engine with the fuel pump fuse out |
| Step 6 | Remove the upper plenum on the intake manifold, along with any cables, hoses, or wiring that restricts access |
| Additional Information | You may need an injector removing tool as they can get stuck due to carbon build-up. It is also recommended to replace the send line when you do the job because it's torque to spec and reusing it can cause fuel to leak onto the engine, causing a fire |
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What You'll Learn
Removing the fuel rail
To remove the fuel rail from a 2009 Mini Cooper S, first relieve the pressure within the fuel rail by briefly running the engine with the fuel pump fuse out. Then, remove the upper plenum on the intake manifold, along with any cables, hoses, or wiring that restricts access. The supply and return lines are then removed from the fuel rail. The electrical connectors to each fuel injector are unlocked and removed. Finally, the fuel rail is unbolted and removed from the intake manifold.
It is important to note that the injectors can get stuck due to carbon build-up. In this case, an injector removing tool may be required. This tool can be purchased from MINI, with the tool number being 13 0 220.
Additionally, the send line should be replaced when removing the fuel pump, as reusing it can cause fuel to leak onto the engine and cause a fire.
Once the fuel rail is removed, the injector(s) requiring replacement can be removed from the fuel rail, taking care to not allow any debris to enter the exposed openings.
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Relieving pressure in the fuel rail
To relieve pressure in the fuel rail of a 2009 Mini Cooper S, you must first ensure the engine is cold. Then, briefly run the engine with the fuel pump fuse out.
The fuel pump is held in place by three bolts, and has a send and return line that need to be undone. It is recommended that you replace the send line when you do this job, as reusing it can cause fuel to leak onto the engine and cause a fire.
Once the pressure is relieved, the upper plenum on the intake manifold is removed, along with any cables, hoses, or wiring that restricts access. The supply and return lines are then removed from the fuel rail. The electrical connectors to each fuel injector are unlocked and removed, and the fuel rail is unbolted and removed from the intake manifold.
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Removing the electrical connectors
To remove the electrical connectors from the fuel injectors of a 2009 Mini Cooper S, first relieve the pressure within the fuel rail by briefly running the engine with the fuel pump fuse out. Then, remove the supply and return lines from the fuel rail. Unlock and remove the electrical connectors to each fuel injector. You may need an injector-removing tool, as they can get stuck due to carbon build-up.
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Using an injector removing tool
If you're replacing the fuel injectors in a 2009 Mini Cooper S, you may need an injector-removing tool. This is because the injectors can get stuck due to carbon build-up.
To use an injector-removing tool, you will first need to relieve the pressure within the fuel rail by briefly running the engine with the fuel pump fuse out. Then, remove the upper plenum on the intake manifold, along with any cables, hoses, or wiring that restricts access.
Next, you will need to remove the supply and return lines from the fuel rail. The electrical connectors to each fuel injector are then unlocked and removed. After this, the fuel rail is unbolted and removed from the intake manifold.
Finally, you can remove the injector(s) requiring replacement from the fuel rail, taking care not to allow any debris to enter the exposed openings.
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Replacing the send line
The fuel pump is held in by three bolts and has a send and return line that need to be undone. It is recommended that you replace the send line when you do the job because it is torque to spec and reusing it can cause fuel to leak onto the engine, which could cause a fire.
To replace the send line, you will need to relieve the pressure within the fuel rail by briefly running the engine with the fuel pump fuse out. Once the engine is cold, you can remove the upper plenum on the intake manifold, along with any cables, hoses, or wiring that restricts access.
With the engine off, you can then remove the supply and return lines from the fuel rail. The electrical connectors to each fuel injector can then be unlocked and removed. The fuel rail can then be unbolted and removed from the intake manifold.
Take care not to allow any debris to enter the exposed openings when removing the injector(s) requiring replacement from the fuel rail. You may need an injector-removing tool as they can get stuck due to carbon build-up.
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Frequently asked questions
First, relieve the pressure within the fuel rail by briefly running the engine with the fuel pump fuse out. Then, remove the upper plenum on the intake manifold, along with any cables, hoses, or wiring that restricts access. Next, remove the supply and return lines from the fuel rail. After that, unlock and remove the electrical connectors to each fuel injector. Finally, unbolt and remove the fuel rail from the intake manifold, and take out the injector(s) requiring replacement.
You will need a specialised injector removing tool, as the injectors can get stuck due to carbon build-up. You may also need a seal kit.
It is recommended that you replace the send line when you do this job, as reusing it can cause fuel to leak onto the engine and cause a fire.
