Safety rules for working with fuel injection devices (BMW 3 Series E30)

Do not start the engine if the battery is not secured.

If the battery is discharged, do not start the engine using a quick battery charger.

Never disconnect the battery while the engine is running.

When charging the battery using a fast charger, disconnect the battery from the vehicle's electrical system.

Before checking the injection system, make sure that the ignition system is working properly, that is, the ignition and spark plugs correspond to the specified parameters.

At temperatures above +80°C (drying after painting) remove the electronic control unit.

Ensure that all connectors are securely connected.

Do not disconnect or connect the electronic control unit connector when the ignition is on.

When checking compression, disconnect the power supply to the fuel pump relay. On vehicles with DME, remove the main injection system relay (relay "26").

Original publication posted on the website BMWman.ru