Method for testing fuel injection nozzles of combustion engines comprises using a fluid jet directed onto a pressure sensor for testing each nozzle. Preferred Features: The pressure in a defined surface region is determined using a pressure sensor. The pre...

The method involves driving a turbine of the respective exhaust gas turbocharger with air under pressure (cold test) and testing at least using measurement parameters on the compressor of the respective turbocharger. The air pressure is at least partly gen...

The testing circuit has a control element (12) with a control contact (13) connected between a supply voltage node (11) and a first input contact (5) of the ignition coil (1), the second input contact (6) of the latter connected to an earth node (15) and t...