Smart Fortwo Fuel Pump Woes, Rough Starts and Stalling

Had similar issues with a Smart ForFour 2012 gasoline model. The symptoms matched exactly, engine stalling, rough idle, and excessive fuel consumption. The fuel pump was failing, causing inconsistent fuel delivery to the injectors. The repair involved replacing both the fuel pump assembly and cleaning the fuel injectors. The issue was quite serious since a failing fuel pump can leave you stranded and potentially damage other components like the catalytic converter due to improper fuel mixture. Diagnostic testing revealed low fuel pressure readings and irregular electrical signals from the pump. The car mechanics found corroded electrical connections at the fuel pump assembly, which contributed to the erratic performance. After the repair, car performance returned to normal with smooth idle and proper fuel economy. The symptoms you describe strongly suggest fuel pump issues, particularly given the starting problems and stalling. Getting it diagnosed promptly is important since continuing to drive with a failing pump can cause more extensive damage to the fuel system. Would recommend having fuel pressure tested and electrical connections checked as first diagnostic steps. These fuel system issues typically require professional repair due to the complexity of accessing and replacing components safely.

Thanks for sharing your experience. My car started working perfectly after the repair, with no issues since then. The idle is smooth and fuel consumption dropped back to normal levels. Wondering about your repair costs and if the automotive diagnosis revealed any other problems with the fuel system? In my case, the complete job including parts and labor came to 650€, which seemed reasonable given the work involved.

Thanks for asking about the repair costs. In my case, the fix was much simpler and cheaper than initially expected. The mechanic found the main issue was just a faulty electrical connection to the fuel pump, not a complete pump failure. After a thorough automotive diagnosis, they discovered no other fuel system problems. The repair only cost 95€ to fix the cable connection, which was causing the inconsistent gasoline delivery and engine stalling issues. Since repairing that connection, my car performance has been perfect, no more rough running or excessive fuel consumption. Really glad I had it checked promptly, as catching these fuel system issues early often prevents more expensive repairs. Good to hear your car is also running well after the repair, even though your case needed more extensive work.

Thanks for the advice. After reading your experiences, I took my car to a trusted mechanic who diagnosed the fuel pump issue quickly. The repair went smoothly and cost 580€ including parts and labor. The mechanic found that the fuel pump was indeed failing, causing the engine stalling and rough running. They also cleaned the fuel injectors while doing the work. The entire repair took about 4 hours. Really happy with the results, the engine now starts immediately, idles perfectly, and fuel consumption is back to normal. No more check engine light either. Glad I got it fixed before any additional fuel system damage occurred. Best decision was getting it checked right away instead of waiting. The symptoms matched exactly what others described and the fix resolved all issues.