A1 Fuel Injector Woes Draining Performance and Wallet

Had similar issues with my 2016 Audi A3 gasoline engine. The symptoms matched exactly, rough starts, high fuel consumption, and power loss. Diagnosis confirmed clogging in multiple injectors due to carbon buildup and low-quality fuel deposits. The repair required ultrasonic cleaning of all injectors and replacement of two that were beyond salvage. Vehicle also needed a full fuel system cleaning to prevent future clogging. The emissions test after repair showed significant improvement, confirming the injectors were the root cause. This is considered a serious issue since dirty or faulty injectors can lead to: Permanent engine damage if left untreated, Failed emissions tests, Further decreased fuel efficiency, Complete engine stalling The repair process took two full days as they needed to: 1. Remove and test all injectors 2. Clean salvageable ones ultrasonically 3. Replace damaged units 4. Perform computer reset 5. Run multiple tests Post-repair, the engine returned to smooth operation with proper power delivery and normal fuel consumption. Regular fuel system cleaning is now part of maintenance schedule to prevent reoccurrence.

Thanks for sharing your A3 experience! It matches my symptoms exactly. My A1 actually developed very similar performance issues last year. After a complete misfire episode, I finally had it checked. Did your repair completely solve the rough idle and stalling problems? Really interested in the repair cost breakdown since I might need the same fix. Has your fuel consumption stayed normal since the repair? Any other issues popping up related to the injectors? The gasoline consumption on mine keeps getting worse, and I am worried about potential emissions test failures coming up. Your detailed explanation about the cleaning and replacement process is super helpful in understanding what I might be facing.

After getting the injection nozzle defect fixed, the engine runs perfectly smooth again. The complete repair totaled 515 Euro, which included thorough ultrasonic cleaning of the injection valve and comprehensive system testing. The gasoline consumption returned to normal levels immediately after the repair. A full 6 months have passed since the replacement, and the rough idle and stalling problems have not returned. The engine starts reliably and maintains steady power output at all speeds. Fuel efficiency has remained consistently good, averaging the factory-specified consumption rates. For preventing future clogging issues, the mechanic recommended using higher grade fuel and getting the fuel system cleaned every 30000 km. This preventive maintenance helps avoid expensive injector replacement and protects the engine from potential damage. The emissions values are now well within normal range, so there should be no concerns about passing future tests. Regular maintenance and quality fuel really make a difference in keeping injection systems working properly.

Thanks everyone for the helpful advice! Took my A1 to a certified fuel system specialist last week after that scary misfire incident. The mechanic found severe clogging in three injectors, with one completely failed. The repair took about 8 hours total. They did a complete fuel system cleaning, replaced two injectors that were beyond saving, and cleaned the third one ultrasonically. Total cost came to 680 Euro including parts and labor. The difference is incredible, no more rough starts or stalling. Engine runs smooth as silk now and the power is fully restored. Fuel consumption has dropped back to normal levels too. The mechanic showed me the old injectors, they were seriously gunked up. Following their advice about using premium gasoline from now on and scheduling regular fuel system maintenance. Really glad I got this fixed before it caused serious engine damage. Thanks again for helping me understand what I was dealing with!