VW Taigo Engine Stalling Points to Fuel System Issues

I experienced a very similar issue with my 2020 VW T-Cross, which shares many mechanical components with your Taigo. As someone with moderate experience in car maintenance, I initially thought it was just a fuel injection problem. The symptoms matched exactly what you described, check engine light, stalling at idle, and significant power loss. After taking it to a workshop, diagnostic testing revealed a defective high pressure fuel pump, which was causing irregular fuel delivery to the engine. The complete repair included: Replacement of the high pressure pump, New fuel pressure sensors, System diagnostics and recalibration, Full fuel system cleaning Total cost came to 1510€, including parts and labor. The repair took about 6 hours to complete. Since the fix, the automotive repair has proven effective with no recurring issues. Regular car maintenance is crucial for preventing similar problems. To provide more specific advice for your case, could you share: Current mileage on your Taigo? When did these symptoms first appear? Have you noticed any unusual sounds from the engine? What type of fuel do you typically use? This information would help determine if your issue is indeed similar to what I experienced.

Just had my car serviced last month at 87908km, and I can confirm these symptoms started showing up recently. The engine makes a slight rattling noise during rough idling, especially when the engine is cold. I always use premium 98 octane fuel. You raise some good points about the fuel injection system. The mechanic mentioned during my last service that the fuel economy was slightly worse than expected, but we didnt investigate further at the time. Now with the engine misfire issues getting worse, I wonder if these problems are connected. Did your repair also improve overall fuel efficiency after fixing the high pressure pump? The current fuel consumption is concerning, and Im hoping fixing the underlying issue might help with that too.

Thanks for providing those details about your Taigo. Your symptoms strongly align with what I experienced on my T-Cross, especially the cold-start rattling and increased fuel consumption. After my high pressure pump replacement, I saw significant improvements in fuel efficiency, dropping from about 8.5L/100km to 7.2L/100km. The connection between poor fuel economy and engine misfires often indicates issues with the fuel delivery system. While my problem was the high pressure pump, your symptoms could also point to a faulty fuel regulator, which might be a less expensive fix. Given your cars mileage and the fact these issues appeared after a recent service, consider requesting a fuel pressure test. This diagnostic step costs around 150€ but helps pinpoint whether the problem lies with the fuel regulator or pump. A proper diagnosis prevents unnecessary parts replacement. Car maintenance history suggests these fuel system components typically start showing wear around 80000-90000km, matching your timeline perfectly. The consistent use of premium fuel is good practice, but mechanical wear in the fuel injection system can still occur over time. The check engine light and rough idle you describe are classic signs of fuel delivery problems. Would be helpful to know if youve noticed any hesitation during acceleration or if the engine stalling happens more frequently in specific conditions?

Thank you for the detailed follow-up about your pump repair. The diagnostic information about fuel pressure testing is particularly helpful. Yes, Ive noticed the engine stalling happens most often when the car is warming up in the morning, and theres definitely hesitation when accelerating, especially between 2000-3000 RPM. Your fuel efficiency improvements after the repair are encouraging. My consumption has increased from 7.0L/100km to around 8.7L/100km over the past few months, so hearing about your results gives me hope this can be resolved. Ill definitely request the fuel pressure test when I take it in. The 150€ diagnostic cost makes sense if it prevents replacing the wrong parts. Given the similar mileage when your issues occurred, Im leaning towards getting both the fuel regulator and pressure sensor checked as you suggested. Thanks for confirming that premium fuel alone cant prevent these mechanical issues. Ill schedule an appointment this week to address these engine misfire problems before they potentially get worse.