Scirocco Fuel Regulator Failure Causing Engine Stalls

I had a very similar issue with my 2012 Golf GTI. Having some experience with basic repairs and maintenance, I initially tried diagnosing it myself, but the symptoms you describe match exactly what I encountered. The check engine light was a clear indicator something was wrong with the fuel system. My car would struggle at idle, particularly after cold starts, and the power delivery was inconsistent. The rough idle was especially noticeable at traffic lights. I brought it to my regular workshop where they confirmed the fuel regulator was malfunctioning. They also performed a full system diagnostic to ensure the fuel pump and other components were working correctly. The total repair, including parts and labor, cost me 45€ which was quite reasonable. The fix completely resolved the stalling and power issues. The check engine light cleared up and hasnt returned in over a year. Before offering more specific advice, could you share: Have you scanned for error codes? When was your last fuel filter change? Does the problem get worse after refueling? What type of fuel do you typically use? These details would help determine if your situation matches what I experienced and whether you might need additional diagnostic steps.

Thanks for sharing your experience. My car just had its 35000km service last month where they also changed the fuel filter. But despite this recent maintenance, I started noticing the engine misfire and power loss issues about a week ago. I did get the error codes scanned at a local shop. They showed P0087 which points to low fuel rail pressure. The problem does seem worse right after refueling, especially when using the recommended 95 octane fuel. Since the fuel pressure sensor readings are abnormal according to the scan tool, I am now quite certain the fuel pressure regulator needs replacement. Would appreciate any insights on typical repair costs, as I would like to budget accordingly.

Thanks for providing those additional details about the error codes and recent maintenance. Your symptoms line up perfectly with what I experienced, especially the engine misfire after refueling and the P0087 code indicating fuel rail pressure issues. In my case, I first suspected just the fuel pressure sensor, but the complete diagnosis revealed the fuel pressure regulator was indeed the root cause. The repair cost was actually higher than initially quoted, around 280€ total. This included: New fuel pressure regulator, Pressure sensor replacement, System diagnostic, Labor costs The mechanic explained that when these components fail, its best to replace both the regulator and sensor together to ensure optimal fuel efficiency and prevent future issues. Since the fix, my fuel consumption has actually improved noticeably. One tip from my experience: make sure they check the entire fuel delivery system during the repair. In my case, they found some minor buildup in the fuel rail that could have eventually caused problems. A thorough fuel system cleaning was included in the service. The repair took about 3 hours in total, and the check engine light hasnt returned since. The engine now maintains steady power and perfect idle, no more misfires or stalling issues.

I appreciate the detailed information and sharing your repair experience. The symptoms and cost breakdown you provided match closely with what I've been experiencing. The 280€ total cost helps me plan my budget accordingly. Based on your feedback and the consistent P0087 code showing low fuel rail pressure in my case, I'll definitely have them check both the pressure regulator and sensor. It's reassuring to know these repairs resolved your rough idle and power issues completely. I'll make sure to request a thorough fuel system inspection and cleaning when I take it in, since you mentioned finding buildup in your fuel rail. Knowing the repair typically takes about 3 hours also helps me plan the service visit. One last question, did you notice any changes in fuel consumption after the repair was completed? You mentioned yours improved, and I'm curious what kind of difference I might expect once these fuel pressure issues are resolved.