VW Up Fuel System Failure Symptoms Point to Pump Issues

A fuel pump issue showed up similarly on my Golf TSI 2014 with clear signs of fuel system problems. The symptoms match what you describe, rough idle, increased consumption, and starting problems. During automotive diagnosis, the mechanic found that the electrical connector on the fuel pump assembly had corroded terminals, causing intermittent pump operation. The fuel pump itself was fine, but the wiring harness connection needed cleaning and new terminals. This is a common failure point in these fuel systems. The pump runs at reduced pressure when the connection is faulty, leading to those exact symptoms. While the repair itself is straightforward, accessing the fuel pump assembly requires dropping the fuel tank on most models. The check engine light and rough running strongly suggest fuel delivery problems. Have a professional check the fuel pressure and electrical connections before replacing the entire pump. Sometimes cleaning and repairing the existing connector resolves these symptoms without major parts replacement. This turned out not to be a serious issue in my case since no components needed replacement. However, leaving it unfixed risks complete pump failure and getting stranded.

Thanks for sharing your experience with the faulty fuel pump connector. Glad you got it sorted without needing a full pump replacement. Did you remember roughly how much the repair cost in the end? Also wondering if you had any other fuel system issues pop up since getting it fixed? I ask because my Up is starting to show very similar symptoms with gasoline delivery problems. The rough idle and stalling are getting worse, and I want to budget appropriately for the potential repair.

The wiring repair on the fuel pump connector worked out to 95€ total, which included labor to access and fix the connection. Much cheaper than replacing the entire pump assembly. Happy to report no fuel system problems since fixing that connector issue. The engine runs smoothly now with normal fuel consumption, no more rough idle or stalling. The check engine light cleared up right after the repair too. The automotive diagnosis was spot-on in identifying the electrical connection as the root cause rather than a complete pump failure. This type of fuel system issue is pretty common, and catching it early likely prevented more expensive repairs down the line. Based on your Up showing the same symptoms, it sounds very similar to what I experienced. Getting it checked soon would be smart to avoid potential pump failure or getting stranded. The repair cost should be comparable if it turns out to be the same connector problem.

I took my Up to a new mechanic yesterday after reading about similar fuel system issues here. Turns out the fuel pump connector was indeed the culprit, just like you experienced. The car performance has improved dramatically since the repair. The auto repair shop found corroded terminals in the fuel pump assembly, matching exactly what you described. Total cost came to 110€ for cleaning, new terminals, and labor. Much better than I expected, especially compared to a complete pump replacement. The mechanic was honest about the fuel system diagnosis and showed me the corroded parts. No rough idle or stalling issues since the fix, and the check engine light is finally off. Fuel consumption is back to normal too. Really glad I checked here first instead of rushing to replace the entire pump. This repair shop will definitely get my business again. Thanks for helping me avoid an unnecessary expensive repair.