What is the most common issue with the Audi A4's fuel system?

I've been having trouble with my Audi A4's fuel system. Sometimes it seems like it's not getting enough fuel and other times it's using too much. What could be causing this and how can I fix it?

There are a few common issues that could be causing this problem. First, you may want to check the fuel filter to see if it needs to be replaced. Another possibility is a faulty fuel pump that may need to be repaired or replaced. It could also be an issue with the fuel injectors, which may need to be cleaned or replaced. My personal advice would be to take it to a trusted mechanic who specializes in Audi vehicles to properly diagnose and fix the issue.

I had a similar issue with my Audi A4 and it turned out to be a problem with the fuel pressure regulator. It was causing inconsistent fuel flow and affecting the overall performance of the vehicle. My advice would be to have a mechanic check this component and see if it needs to be replaced.

I had a similar issue with my Audi A4 and it was due to a dirty fuel injector. I used a fuel system cleaner and it solved the problem. Just make sure to use a high-quality cleaner and follow the instructions carefully. If that doesn't work, it may be worth getting the injectors professionally cleaned or replaced.