A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
- Fuel tank and fuel pump
For what ventilation of a fuel tank is necessary?
The fuel level indicator sensor in a fuel tank
Fuel-supply lines
The fuel pump with the electric drive
Dismantle of the petrol pump with the electric drive
Replacement of the fuel filter
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics
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The fuel level indicator sensor in a fuel tank
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The basic case photographed here is usually pasted in a fuel tank; but here it is shown for the sake of presentation separately. Dismantle of the fuel level sensor (1) is possible after pressing a key (shooter). The pressed key removes blocking (2). It is possible to take out the fuel level sensor. |
Here you see a deaf flange of a fuel tank under the luggage carrier bottom.
At the left: are designated by figures:
1 – a returnable fuel pipe from system of injection;
2 – I will corrode connections of the fuel pump and the fuel level sensor;
3 – a fuel pipe of supply of fuel to system of injection.
On the right: the locking ring of the fuel level sensor unscrews the special tool (2) by means of a graggers (1) here.
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Assembly provision of a deaf flange:
the arrow on a flange (1 or 2) has to be opposite to a mark in a fuel tank (3). In cars with the drive on forward and on all wheels in each case there is the corresponding arrow. |
The sensor is inserted from above into the case of an inlet collector in the middle of a fuel tank inside. How it works, you will find in the head Instrumenty and devices.
Because of a different form of fuel tanks there are also different fuel level sensors for front-wheel and all-wheel drive models. Identification sign: the fuel level sensor with a rectangular float for models with the forward drive; the fuel level sensor for quattro – with a spherical float.
Dismantle of the fuel level sensor
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Important: the fuel tank can be filled a maximum on 2/3, otherwise fuel will follow! |
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- Cast away a floor covering of a luggage carrier.
- Unscrew a black metal cover.
- Mark a fuel pipe of giving and return of fuel – shooters on branch pipes fuel pipes show the direction of the movement of a stream.
- Remove both fuel pipes after opening of collars.
- Unscrew plastic cap nuts. Most often they sit very strongly. Therefore put, whenever possible, stupid screw-driver on an edge of a nut and weaken a nut in easy blows of a hammer to the screw-driver handle. If it is necessary, establish it on different edges of a nut.
- Now it is possible to pull a little up a deaf flange of a fuel tank.
- If it is necessary, dismantle a returnable fuel pipe and an electric wire on a reverse side of a deaf flange.
- Mark the assembly provision of a hose and wire for the subsequent assembly.
- Now undertake a fuel tank a hand and take out the sensor, having at the same time wrung out a fixing ledge from the case of an inlet collector.
- Disconnect the socket of the fuel level sensor on a deaf flange.
- Before assembly moisten with gasoline a sealing ring of a deaf flange.
- Assembly provision of a deaf flange: the arrow on a flange has to be opposite to a mark in a fuel tank. Cars with the drive on forward and on all wheels have own arrow for each case.
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