Multec injection system car Opel Vectra B (petrol)

Individual components, operation, self-help, malfunctions and self-diagnosis, emergency operation function, component test, lambda probe, throttle cable, exhaust gas composition test, malfunction assistance.

General information about the Multec injection system
The 8-valve 1.6 l Vectra engine has the so-called Multec central injection system with a single injection valve, the operation of which is determined by the...

The most important components of the Multec injection system
Understanding the operation of the Multec central injection system will be easier if you become familiar with the purpose of the individual components of this...

Functioning of the Multec injection system
Harmonious work of nodes The fuel pump supplies gasoline under pressure to the pressure regulator. It ensures constant pressure on the injection valve (0.75...

Self-help
Unfortunately, many types of injection system testing are not available to the amateur due to the lack of necessary control devices. However, there is still...

Malfunctions and self-diagnosis
The Multec central injection system control unit has a program memory. The memory is able to recognize and store defects that occur during engine operation. A...

Emergency mode function of the Multec injection system
The ignition and injection system is supported by an extensive emergency mode program if a sensor fails, a wire connection is broken, or contact with ground...

Checking nodes
The following sections describe tests of injection system components that are possible using amateur tools. Checking fuel pressure Fuel pressure can only be...

Throttle cable
Removal the throttle cable The throttle cable connects the gas pedal and the throttle valve of the injection system. Its biggest drawback: it is very sensitive...

Exhaust Gas Test (AU)
Maintenance work For vehicles with a regulated catalytic converter, the exhaust gas test is prescribed for the first time three years after the first approval...

Should I perform an idle speed adjustment?
Installation work is unnecessary in cars with a catalytic converter, since there is nothing to regulate. The lambda probe and, accordingly, the Multec control...

Help with Multec central injection system faults
If it is not possible to read the fault memory with a reading device in an Opel workshop, you can also detect the defect using our tips in the "Help with...

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