VW Virtus Stalling: Fuel System Fault Shows Warning Signs

Having dealt with similar symptoms on a VW Polo 2016 gasoline model, fuel contamination was the root cause. The engine would stall at idle, affecting fuel economy and causing inconsistent combustion chamber performance. Initial diagnosis showed fuel system error codes, just like your case. After thorough testing, we found water in the fuel tank had created corrosion in the fuel lines. This required cleaning the entire fuel system, replacing the fuel filter, and using specific fuel additives to prevent future contamination. The repair was quite serious as contaminated fuel had also affected the fuel pressure sensor connections. When these connections corrode, they send incorrect readings to the ECU, triggering engine knock and stalling issues. The fix involved: Complete fuel system flush, New fuel filter installation, Fuel pressure sensor replacement, Cleaning of injector connections, System diagnostic reset This is not a quick fix situation and requires proper diagnosis. Your mechanics suspicion about fuel composition makes sense given these symptoms. Would recommend getting the fuel system tested for contamination before exploring other expensive repairs.

Thanks for sharing that detailed repair info. My Virtus had those exact symptoms, stalling at idle and check engine warnings. The fuel system cleanup and new fuel filter fixed it completely, plus they found some corroded connectors that needed replacement. Just curious, do you remember the total repair cost? Mine was around 450€ including parts. Also, have you had any recurring fuel mixture issues since the fix? Been six months for me and running smoothly so far, but always good to know what to watch out for.

Good to hear your Virtus is running well after the repairs. After facing similar wrong fuel composition issues with my VW Polo, fixing the corroded connections was key for proper fuel system function. The total cost was surprisingly lower at 95€, mainly covering the cable and connector replacement labor. The fuel economy has been consistently good since the repair, with no recurring issues in the combustion chamber or fuel system. One tip, using quality fuel and periodic fuel filter changes help prevent these problems. Regular fuel additives can also protect against contamination, though they are not always necessary with proper maintenance. Six months without issues is a good sign. The higher cost of your repair likely included the complete system cleanup, which explains the price difference. As long as the check engine light stays off and idle performance remains stable, you should be good to go.

Taking my car to the mechanic last week finally solved the mystery. After hearing your similar experience, I went ahead with the fuel system inspection. Turned out you were spot on, they found contamination and some corroded parts in the fuel delivery system. The final fix included cleaning the entire fuel system, installing a new fuel filter, and replacing a couple corroded sensor connections. Total cost came to 450€, which seems fair considering the work involved. The engine knock is completely gone and it idles perfectly now. Really glad I checked here first instead of jumping into more expensive repairs. Will definitely keep an eye on the fuel mixture and maybe use some fuel additives as preventive maintenance going forward. Six months without issues sounds promising. Thanks again for helping me avoid getting overcharged for unnecessary work.