Petrol engine fuel injection system Volkswagen Sharan 1

VR6 engine fuel injection system
The VR6 engine is controlled by a company-produced «Bosch» Motronic injection system, which has already been installed previously on other car models of companies «Volkswagen» and...

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

The principle of operation of the ECM under various conditions
When the ignition is switched 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...

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

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

Fuel pressure regulator
Pic. 201. The top and bottom parts of an inlet collector and the details located nearby: 1 - the upper part of the intake manifold; 2 - HV wire guide; 3 - sealing ring; 4 - fuel...

Fuel Injection System Malfunctions
The VR6 engine ECU has a built-in fault memory that detects malfunctions in the operation of the ECU and Motronic elements and enters them into the ECU memory. In the event of a...

Removal and installation of fuel injectors
Remove the fuel injectors in the following order: Pic. 202. The air filter and the details located near it: 1 - upper part of the air filter; 2 - vacuum hose; 3 - O-shaped sealing...

Checking the Mass Air Flow Sensor
You can check whether the mass air flow sensor is receiving electricity and whether data is being sent from it to the ECU. To do this, you must have experience in measuring the...

Throttle drive cable
The throttle cable is very sensitive to damage. When carrying out any work in the engine compartment of the car, make sure that it is not bent. You may never need to replace the...

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 mesh tank, thanks to which even strongly splashing...

Checking the performance of the fuel pump
If the pump is not working well or it is suspected that it is not supplying enough fuel, then perform a pump performance check in the following order: check the fuse number 18 in...

Removal and installation of the fuel pump
The fuel pump is attached in a peculiar way and a special VW 3217 key is required to remove it. If it is, the pump can be removed together with the inside of the suction housing....

Fuel filter — removal and installation
Pic. 206. Details of the power supply system located near the fuel tank: 1 - fuel tank cap; 2 - sealing ring; 3 - safety ring; 4 - rubber seal; 5 - check valve; 6 - O-shaped...

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

Description and operation of the Simos injection system (engine 2.0 l)
The 2.0-liter engine has a new multi-point (distributed) fuel injection called Simos, derived from the name of its manufacturer - «Siemens». This state-of-the-art multipoint...

Simos system idle mode (engine 2.0 l)
When the throttle valve is closed, the signal from the throttle position sensor enters the ECU, which issues commands to open the idle air control solenoid valve, installed...

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