Petrol engine fuel injection system Volkswagen Sharan 1

Fuel injection system of the VR6 engine
The VR6 engine is controlled by the Motronic injection system produced by Bosch, which has already been installed on other models of cars from the company "Volkswagen" and "Audi"....

Precautions when carrying out repair work on the injection system
When performing repair and maintenance work on the injection system, observe the following precautions to avoid injury or damage to the system itself: Caution: To prevent damage...

Operating principle of the ECM under various conditions
When the ignition is turned on, the ECU turns on the electric fuel pump, which creates fuel pressure in the distribution line. At the same time, the ECU processes the signal from...

Electronic control unit — general information
The ECU is the central engine control unit. It receives information from sensors and controls actuators, ensuring optimal engine operation. The ECU is located under the dashboard...

Throttle body
Fig. 200. Parts installed near the throttle body: 1 - upper part of the intake manifold; 2 - cable guide; 3 - bolt, 10 Nm; 4 - rear right support between the upper part of the...

Fuel pressure regulator
Fig. 201. Upper and lower parts of the intake manifold and nearby parts: 1 - upper part of the intake manifold; 2 - HV wire guide; 3 - sealing ring; 4 - fuel supply hose; 5 - fuel...

Fuel injection system faults
The VR6 engine ECU has a built-in fault recorder that detects faults in the operation of the ECU and Motronic system components and enters them into the ECU memory. If the coolant...

Removal and installation of fuel injectors
Remove the fuel injectors in the following order: Fig. 202. Air filter and parts located near it: 1 - upper part of the air filter; 2 - vacuum hose; 3 - O-ring seal; 4 - mass air...

Checking the mass air flow sensor
You can check whether the mass air flow sensor is receiving electricity and whether it is sending data to the ECU. To do this, you need to have experience measuring electrical...

Throttle drive cable
The throttle cable is very sensitive to damage. When performing any work in the engine compartment of the car, make sure not to bend it. You may never have to replace the throttle...

Electric Fuel Pump — General Information
The elastically suspended submersible fuel pump is installed directly in the tank, in its lower part, and is surrounded by a reservoir with a mesh, thanks to which even strongly...

Checking the performance of the fuel pump
If the pump is not working properly or there is a suspicion that it is not delivering enough fuel, then check the pump's performance in the following order: check the fuse #18 in...

Removal and installation the fuel pump
The fuel pump is attached in a unique way and a special VW 3217 key is required to remove it. If you have one, the pump can be removed together with the inner part of the suction...

Fuel filter — removal and installation
Fig. 206. Fuel system parts located near the fuel tank: 1 - fuel tank cap; 2 - sealing ring; 3 - safety ring; 4 - rubber seal; 5 - check valve; 6 - O-ring seal; 7 - ventilation...

Fuel level sensor in the tank
The fuel level sensor includes a float and a potentiometer. As the fuel level drops, the float drops, and the potentiometer connected to the float increases the electrical...

Description and operation of the Simos injection system (2.0 l engine)
The 2.0-liter engine features a new multi-point control system (distributed) fuel injection system called Simos, formed from the name of its manufacturer - "Siemens". This modern...

Simos system idle mode (2.0L engine)
When the throttle valve is closed, the signal from the throttle position sensor is sent to the ECU, which issues commands to open the electromagnetic valve of the idle speed...

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