VW Touran Stalling + Power Loss Points to Fuel Issues

Had very similar symptoms on a 2016 VW Tiguan 2.0 TSI. The rough idling and power loss are typical signs of fuel delivery issues. When car sensors detect irregular fuel pressure, they trigger the check engine light and the engine goes into safety mode. The fuel volume regulator could be the culprit, but in my case, automotive repair revealed a failing high pressure fuel pump. This is actually a common issue that affects fuel efficiency significantly. The symptoms started exactly like yours, stalling at idle, lack of power, and check engine light. This turned out to be a serious repair job requiring the replacement of the entire high pressure pump assembly. The car had to stay at the shop for several days due to the complexity of accessing and testing the fuel system components. Worth noting that driving with these symptoms risks damaging other components in the fuel delivery system. Would recommend getting it properly diagnosed with a scanner that can read fuel pressure values. A faulty high pressure pump often requires immediate attention to prevent further complications.

Thanks for sharing your experience with the fuel pump replacement. My symptoms do sound identical, especially the rough idling and power loss you mentioned. The car is currently at a local shop and theyre checking the entire fuel injection system. Did you recall how much the high pressure pump assembly replacement cost you in total? Also wondering if youve had any other fuel delivery related issues since the repair was done?

Thanks for asking about the follow-up. After getting the car back from automotive repair, everything has been running perfectly for months now. The fuel volume regulator was indeed faulty as suspected, and fixing it resolved all those annoying symptoms, no more stalling or power loss issues. The total repair bill came to 1510€ for the high pressure pump replacement. While it was a significant expense, the improvement in fuel efficiency and overall engine performance made it worthwhile. The car now maintains steady idle and delivers consistent power through all driving conditions. Since the repair, fuel economy has notably improved and there have been zero issues with the fuel delivery system. Regular car maintenance checks show everything is functioning as it should. The mechanic mentioned these repairs typically provide long-term reliability when done properly, which has proven true in my case. The check engine light hasnt returned, and the engine runs smoothly without any of the previous symptoms. Its worth mentioning that addressing these fuel system problems promptly helps prevent additional damage to related components.

Today I got my car back from the shop after dealing with those stalling and power loss issues I posted about earlier. Turns out you were spot on, it was indeed the high pressure fuel pump causing all the trouble. The automotive repair took three days total since they had to order some specific parts. The mechanics did a thorough check of the entire fuel injection system while they were at it. Final bill came to 1420€ which was pretty close to what you mentioned. They showed me the old pump and it was definitely worn out, affecting the fuel delivery significantly. Since the repair, the rough idling has completely disappeared and the car feels much more responsive. Fuel economy seems better too, though I will need more time to confirm the actual improvement. The check engine light is finally off and the engine runs perfectly smooth now. Really glad I got this fixed when I did, the mechanic mentioned that continuing to drive with the faulty pump could have caused more expensive damage. Thanks again for helping me identify the likely cause before I went in.