VW Fox Fuel System Troubles, Owner Seeks Solutions

I had very similar fuel delivery problems with my 2012 VW Polo diesel. As someone with some automotive diagnosis experience, the symptoms you describe match exactly what I encountered. The rough running and stalling were the first signs, followed by starting issues. After initial diagnosis, my mechanic found that the electrical connection to the fuel pump was damaged, causing intermittent fuel delivery problems. The repair involved replacing the wiring harness and connector assembly, which cost 95€ including labor. The fix was straightforward once properly diagnosed. Car performance returned to normal immediately, and fuel consumption went back to standard levels. The check engine light cleared after the repair. Before suggesting more specific solutions, could you share: Current mileage on your Fox, When was the last fuel filter change, Any recent work done on the fuel system, The specific error codes you are getting This information would help determine if your issue is identical to what I experienced with the pump failure or if there might be other factors involved in the gasoline delivery system. The wiring issue is common in VW diesels from that era, but its best to get a proper diagnosis before replacing parts.

Last service was 3 months ago at 74913km. After checking your similar fuel pump symptoms, I can confirm the problem sounds identical. My mechanic replaced the fuel filter during the last service, so that should be fine. The auto repair shop initially suggested a complete fuel pump replacement for 450€, which seemed excessive given the symptoms. The error codes P0087 and P0191 point to fuel rail pressure issues, which could indicate either a pump problem or fuel system pressure regulation issues. Given your experience with the wiring harness fix, I will have the car mechanics check the electrical connections first before agreeing to a full fuel pump replacement. A proper automotive diagnosis focusing on the wiring could save significant repair costs. Would you mind sharing how long the wiring repair took in your case? Currently weighing repair options and workshop time estimates.

Thanks for the additional details about your Fox. Those error codes definitely mirror what I experienced with my Polo diesel. The electrical wiring repair on my fuel system took about 2 hours total, including diagnostic time. Given the shared symptoms and error codes, starting with the wiring inspection seems like a smart approach to automotive diagnosis. My mechanic first tested the fuel pump connectivity using specialized diagnostic equipment before determining the wiring harness was the culprit. 450€ for a complete fuel pump replacement does sound steep when the issue might be resolved with a simpler fix. In my case, the fuel injector system worked perfectly after just addressing the wiring, no need for a full pump replacement. Your recent fuel filter change rules out one common cause, which further supports investigating the electrical connection first. If your car mechanics find similar wiring damage to what I experienced, the repair should be relatively straightforward and much more cost-effective than replacing the entire pump. Make sure they thoroughly check the connector assembly at the fuel pump, this was the exact failure point in my case and a common weak spot in these models.

Thanks for sharing those repair details. Your wiring harness experience makes a lot of sense given my symptoms. A 2-hour repair timeline sounds much more manageable than what the shop quoted for a full pump replacement. Based on the success of your repair, I will request them to specifically inspect the fuel pump wiring and connector assembly first. Engine stalling and rough running seem too similar to your case to ignore the potential electrical connection issues. The matching error codes for fuel rail pressure also support this theory. The auto repair shop wants to schedule the car for next week. I will make sure they perform a complete automotive diagnosis of the electrical system before jumping to conclusions about needing a new fuel pump. The potential to save over 350€ by fixing just the wiring makes this approach well worth pursuing. Will update once I have the results from the proper inspection. Your repair experience has definitely helped point me in a more cost-effective direction for resolving these fuel system issues.