What causes the body vibration when starting an Audi Q5L?
2 Answers
Audi Q5L body vibration during startup is caused by a dirty throttle or a damaged throttle assembly. The detailed reasons and solutions are as follows: Dirty throttle: The main reason for a dirty throttle is the accumulation of carbon deposits at the junction of the throttle valve plate shaft and the throttle body, resulting in inaccurate throttle opening and causing idle vibration. Therefore, the throttle can be cleaned first. If the vibration stops after cleaning, it indicates that the issue was caused by a dirty throttle. Damaged throttle assembly: If the body continues to vibrate after cleaning, it may be due to a damaged throttle assembly. The throttle assembly needs to be replaced.
I also experienced the issue of engine shaking when starting my Audi Q5L. It happened during a cold start in the morning - the car vibrated unsteadily right after ignition, making the engine feel unstable. A mechanic friend suggested it might be due to excessive carbon deposits in the engine causing incomplete combustion, or aging ignition coils affecting spark plug performance. Too much carbon buildup leads to uneven cylinder operation, making the whole car shake uncomfortably. The fuel system could also be suspect - clogged fuel injectors or poor-quality gasoline affecting fuel performance. Later, I cleaned the throttle body and intake pipes myself and replaced the spark plugs, which resolved the shaking. Leaving this untreated long-term increases engine wear and fuel consumption. If you encounter shaking while driving, get it checked promptly to avoid heightened safety risks on the road. Regular maintenance is key - cleaning carbon deposits can prevent this issue.
