S6 Injector Failure Warning Signs Revealed

Having experienced nearly identical symptoms with my 2008 Audi S4, I can relate to this situation. The rough idle, excessive fuel consumption, and power loss strongly suggest injector issues. In my case, the diesel injection valves were severely clogged with carbon deposits, causing irregular fuel delivery. The symptoms started gradually but became quite serious, affecting both performance and emissions. The vehicle would struggle particularly during cold starts, and the Check Engine light eventually came on. The repair required a complete fuel injector cleaning and replacement of two damaged injectors. This was indeed a serious issue that needed immediate attention, as continued operation could have led to further engine damage and even higher repair costs. While injector problems are a common diagnosis, its important to have a proper diagnostic test run first. The symptoms could also indicate issues with the fuel pump or fuel pressure regulator. A professional mechanic should perform pressure testing and electronic diagnostics to confirm the exact cause. Getting this fixed properly restored normal operation, bringing back smooth idle, proper fuel consumption, and full power. The engine response improved significantly after the repair.

Thanks for confirming my suspicions about injector problems. Those symptoms you described match exactly what my S6 was doing. Had mine fixed about 6 months ago after the engine started misfiring badly. Just curious, do you remember roughly what the repair cost you? My bill was pretty steep but the engine runs perfectly now. Also wondering if youve had any other issues pop up since the injector replacement or if that solved everything completely? Been keeping a close eye on fuel consumption and engine performance since the fix. Really helps to hear from someone who went through the same problem with similar car.

Thanks for asking about the costs. The repair totaled 515 Euro for my injector issue, which included cleaning and fixing the defective injection nozzle. Since getting it fixed by the mechanic, the engine has been running flawlessly, no more misfiring, stalling, or excessive fuel consumption. The repair completely resolved all the symptoms. Having a properly functioning injection system made a huge difference in engine performance. Fuel economy returned to normal levels, and cold starts are smooth again. No other issues have emerged in the months following the replacement. Its worth noting that regular fuel system maintenance can help prevent future clogging of injection components. Using quality diesel and keeping up with scheduled fuel filter changes has kept everything running optimally since the repair.

I finally got my injector situation sorted out last week. After seeing the previous responses here matching my symptoms exactly, I took my S6 to a different mechanic who specialized in diesel engines. The diagnostic test confirmed multiple failing injectors causing the misfire problems. Total repair came to 780 Euro including parts and labor. While not cheap, the performance difference is like night and day. No more rough starts or stalling, and fuel consumption is back to normal. The mechanic showed me the old injectors, they were badly clogged with carbon deposits. Really opened my eyes about proper maintenance. The whole repair process took about 4 hours, but it was worth the wait. Engine runs perfectly smooth now, especially during cold starts. Definitely learned my lesson about not waiting too long when these symptoms first appear. Regular maintenance checks will be a priority from now on to avoid another major replacement job.