RS5 Throttle Valve Issues Causing High Fuel Consumption

Having experienced similar throttle issues with my S5 last year, these symptoms point to a potentially serious throttle body problem. The increased fuel consumption combined with rough idling often indicates carbon buildup affecting throttle position and response. The throttle body controls air flow into the engine, directly impacting fuel efficiency. When it malfunctions, the engine management system struggles to maintain proper air-fuel ratios, leading to the starting issues and hesitation you describe. My case required a complete throttle body cleaning and recalibration of the throttle position sensor. The carbon deposits were severe enough to affect throttle plate movement. The repair involved removing the throttle body, professional ultrasonic cleaning, and electronic recalibration of the throttle position sensors. This is not a problem to ignore, as it can lead to further engine management issues and potentially damage other components. While throttle cleaning might solve the issue, be prepared that the throttle body assembly might need replacement if the electronic components are compromised. Key indicators that helped diagnose my issue: Fluctuating idle speeds, Delayed throttle response, High fuel consumption, Check engine light intermittently appearing Consider getting a second opinion from a specialized shop with experience in VAG throttle systems.

Thanks for sharing your experience with the S5 throttle body issues. I had the exact same problems with my RS5. After the engine idle went crazy and fuel consumption shot up, I finally got it fixed. My throttle cleaning and recalibration sorted most problems, though I had to replace a sensor too. Did you keep track of the repair costs? Just curious since I want to compare what different shops charge for this kind of work. Also, has the throttle position system stayed stable since the repair, or have you noticed any other issues popping up?

After getting the throttle valve fixed and replacing the defective accelerator pedal module, my S5 has been running perfectly. The total repair came to 205 Euro, which included the thorough throttle cleaning, sensor replacement, and recalibration of the throttle position system. The fuel efficiency has returned to normal levels, and the air intake system is working as intended. No more hesitation or rough idling issues. The investment was worth it since the throttle body problems could have led to more expensive repairs if left unchecked. The throttle cleaning made a noticeable difference in response and overall performance. Its been over a year now, and the system has remained stable with no recurring issues. Regular maintenance of the air intake system has helped prevent carbon buildup from returning. Based on the symptoms you described, it sounds like your repair addressed the same core issues. The stable idle and improved fuel consumption confirm the diagnosis was correct. Just remember to keep the throttle body clean to prevent future problems.

Following the mechanic visit last month, I can confirm the throttle body repair completely fixed my RS5s issues. The engine throttle response is now smooth, and fuel consumption dropped back to normal. Cost me 180 Euro for the cleaning and sensor replacement, cheaper than I expected. The air intake system needed a good cleaning too. There was significant carbon buildup affecting the throttle position sensor. The mechanic showed me the gunk they cleaned out, no wonder it was running rough. My fuel efficiency has improved dramatically. The engine starts perfectly now, and the idle is steady. Best of all, that annoying hesitation is completely gone. Regular maintenance should prevent these issues from coming back. Definitely worth getting it properly diagnosed and fixed rather than letting it get worse. The repair shop did a thorough job and even showed me how to spot early warning signs of throttle body issues in the future.