T-Cross Fuel Mix Issues: Rough Idle & Power Loss Fix

Had similar issues with my 2019 VW Polo TSI. The symptoms match exactly what I experienced, power loss, rough idle, and check engine light. After diagnosis, it turned out multiple fuel injectors were clogged and one was completely defective. The fix required removing and cleaning all fuel injectors, plus replacing the faulty one. The injector problem was causing uneven fuel distribution, leading to the lean condition. This is a serious issue since bad fuel injectors can damage other engine components if left unchecked. The mass air flow sensor was tested but worked fine. Often these symptoms get misdiagnosed, but proper diagnostic testing showed the fuel injectors were definitely the culprit. The repair involved: Full fuel system cleaning, Testing injector spray patterns, Replacing one defective injector, Resetting engine management system After the repair, the engine ran smooth again with proper power delivery. The check engine light cleared and stayed off. Would recommend getting it checked soon since running lean can cause additional engine damage. The symptoms you describe strongly suggest injector issues rather than mass air flow sensor problems, especially with that mileage on a relatively new engine.

Thanks for sharing your experience with the fuel injectors. My T-Cross had a similar problem last month. After the fix, the car runs perfectly now with no more rough idling or check engine light warnings. Feels like a different car, honestly. The air-fuel ratio is spot on now and acceleration is smooth again. Just curious, do you remember how much the repair cost you in total? Also, have you noticed any other issues popping up since the fix?

Good news about getting your T-Cross sorted out. After my last repair that cost 515€ to replace the defective injector, the engine has been running perfectly with the correct air-fuel ratio. The oxygen sensor readings confirm the lean condition is completely fixed. The throttle response is much smoother now and the engine maintains steady power through all RPM ranges. The intake manifold pressure readings are normal and consistent. When they replaced my faulty injector, they also inspected the EGR valve and other components to ensure everything was working together properly. No issues have emerged since the repair 3 months ago. The engine idles smoothly and accelerates cleanly without any hesitation or check engine lights. Investing in fixing the injector problem early was worth it to prevent more extensive engine damage from running lean. Make sure to use quality fuel and follow the maintenance schedule to help prevent injector problems from recurring. Regular fuel system cleaning can also help maintain optimal injector performance.

Finally got my car properly diagnosed and fixed at a new mechanic. The repair cost came to 480€ which included cleaning the fuel system and replacing one bad injector. Money well spent considering how much better the car runs now. The throttle body and intake manifold were also inspected during the service. Everything checked out fine, though they recommended regular fuel system maintenance to prevent future problems. The air-fuel ratio is now perfect according to their diagnostic readings. Really glad I sought a second opinion instead of continuing with band-aid fixes. No more check engine lights or rough running since the repair three weeks ago. The car feels like new again with smooth acceleration and stable idle. Thanks for helping point me in the right direction with the fuel injector diagnosis. For anyone else seeing similar symptoms, definitely get the injectors checked properly. Running lean can lead to bigger problems if left unfixed. Good to have this sorted before it caused any engine damage.