Fuel tank and fuel pump The fuel tank in the Audi A4 quattro is a small marvel of engineering. Here the fuel tank is photographed from below with the rear axle dismantled. In this...
Why is fuel tank venting necessary? The charcoal filter solenoid valve is located at the bottom left of the rear in the engine compartment 1 - tube to the carbon filter; 2 - solenoid valve; 3 -...
Fuel level indicator sensor in the fuel tank The support housing photographed here is usually glued into the fuel tank; but here it is shown separately for the sake of clarity. Dismantling the fuel level...
Dismantling of fuel lines In our fuel injected engines, the hoses and fuel lines must be able to withstand a pressure of more than 5 bar. Therefore, the hoses are made of...
Electric fuel pump In all engine versions of the Audi A4, the electrically driven fuel pump is inserted into the intake manifold housing at the bottom of the fuel tank. It...
Removing the electric petrol pump The so-called fuel delivery module consists of: 1 - fixing nuts for connecting the pump to the power supply; 2 - electrical wires from the blind flange to the...
Fuel filter replacement The fuel filter in the Audi A4 is designed in such a way that it does not need to be changed throughout the life of the engine. This is very good, because in...
Removing the air filter insert Order of execution 1. Where present, remove the cap on the air filter. 2. Remove the air intake hose from the air filter housing and position it in front of...
Blowing out the air filter insert Every 15,000 km or annually, we recommend cleaning the filter paper to remove large dust particles. When driving on very dusty roads, this interval can be...
Preheating of the intake air Six-cylinder engine The automatic intake air preheater is located on the inlet side of the air filter housing. He is faced with the task of maintaining a...
Switching intake manifold The 2.6L six-cylinder engine does not have a switchable intake manifold. Its intake manifold consists of the assemblies shown here. Here, special attention is...