Audi A4 Fuel Pump Problems. You can supply direct power to these two wires to check the fuel pump operation and you should get close to 6 bars of pressure87 psi. Check Engine Light andor Hesitation Due to Failed High Pressure Fuel Pump on Audi A4 Problem Description 20L turbo charged engines may develop a hesitation on acceleration andor illumination of the Check Engine Light due to a failed high pressure fuel pump or a worn camshaft follower or camshaft.
This article applies to the Audi A4 B7 20t Quattro 2005-2008. Our technical articles will break down how your A4 B7s fuel system functions and how to handle big ticket repair items yourself. A high pressure pump driven off the engine and a low-pressure pump situated in the fuel tank feeding fuel towards the engine.
The Genuine Audi factory water pump was manufactured with plastic instead of aluminum.
There are physical signs that you can feel when your A4s fuel pump is going out. How to check diesel high Pressure Pump in Audi A4 okay or not diesel pressure issue and showing trouble code rail pressure sensor some time. The water pump on the B8 A4 is the most vulnerable and likely failure point on these cars. You can supply direct power to these two wires to check the fuel pump operation and you should get close to 6 bars of pressure87 psi.
