Hpfp Audi A4. The cam follower on the 20T FSI motor is notorious for wearing through and causing camshaft wear. A high pressure pump driven off the engine and a low-pressure pump situated in the fuel tank feeding fuel towards the engine.
For full show notes visit the blog post atNext up in our series on failing Volkswagen parts we are looking at the 20t TSI High Pressure Fuel Pump failure. This trouble code detects that the fuel railsystem pressure is too low. IE High Pressure Fuel Pump HPFP Upgrade Kit for VW Audi 20T FSI 42L FSI Engines The IE HPFP upgrade reliably increases the output of the OE fuel system delivering 50 more displacement than the factory unit.
There are physical signs that you can feel when your A4s fuel pump is going out.
Finally high pressure fuel is delivered to the injectors which spray directly into the cylinders. How VW and Audi 20t TSI High Pressure Fuel Pumps Fail HPFP Video Next up in our series on failing Volkswagen parts we are looking at the 20t TSI High Pressure Fuel Pump failure. Audi B8B85 A4 Quattro 20T Pump - OE - Low Pressure. Fuel pressure is then bumped up to a maximum of 110-130 bar depending on factory parts with the HPFP.