Fuel injection system device Under the bonnet of a modern car, electronically controlled fuel injection systems have long been the "tone-setter" in the intake tract of petrol engines. On the exhaust...
Checking the intake system for leaks ORDER OF EXECUTION Check the vacuum hoses for cracks and good fit. Also check all the hoses of the injection system or intake manifold (absolute pressure sensor, brake...
Checking the idle speed The idle speed, depending on the consumer switched on (e.g. headlights, air conditioning or power steering), is constantly adjusted by the engine control unit....
Idle oscillations are a systematic phenomenon If the battery has been disconnected, the on-board computer needs about eight kilometers to bring itself into "sports form" at this time. This time is required to...
Checking the idle speed control valve ORDER OF EXECUTION Start the engine at "constant throttle". Turn on as many power consumers as possible (AC, lighting, fan, rear window heating, etc.) and turn the...
Checking the injector ORDER OF EXECUTION A faulty injector sometimes reveals itself already at idle speed by applying a "bare hand" to it: it does not vibrate - unlike others. To avoid...
Diesel Engine Fuel Supply — Basic Design In contrast to petrol engines, injection systems in diesel engines operate with high system pressures. Fuel pumps, including the control periphery, are fundamentally...
Visual inspection of the diesel engine injection system ORDER OF EXECUTION Check all pressure pipes - and not just their connections - for leaks and... ...check the drain pipes as well. Next, check the seal on the pump...