Fuel injection system malfunctions (Opel Vectra A)

Before carrying out any injection system checks, the following conditions must be met:

Properly start the engine. When the engine is warm, press the accelerator pedal and hold it until the engine starts.

There must be sufficient fuel in the fuel tank.

The engine must not have any mechanical damage, the battery must be charged, the starter must operate at a sufficient number of revolutions, and the ignition system must be in good working order.

There should be no leaks or contamination in the fuel system and crankcase ventilation system.

There must be reliable contact of all elements with the "ground".

Caution: Before disconnecting fuel system pipes and hoses, they must be thoroughly cleaned.

(Article posted on a web portal: OPELBOOK)