Car Throttle Sticking Problems of Audi A4

Under hard acceleration, the throttle on my 2003 Audi A4 became stuck wide open for approximately 15 seconds. In order to stop the car, I needed to turn off the ignition. I was able to reproduce the problem with the car in neutral, and the throttle seems to persistently stick when the engine revs over 5000 rpm. I'm planning on taking this car to an Audi dealer tomorrow to have the problem diagnosed further.

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Audi A4 1999 2. 8 liter - throttle stick during cold weather when cruising at steady speed or when accelerating from rest. Drivers only recourse is to pull over and switch engine off, wait a period of time before restart. Identified as moisture freezing in throttle body. Note currently Audi a6 recall in place.

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Throttle sticking on acceleration in sub-zero driving temperatures. Brakes enabled me to stop car and shut off engine. If I took my foot off the brake, the car re-accelerated to the stuck position. Once the engine was shut off, engine heat evidently melted the ice and idle speed returned to normal. Have spoke to other Audi owners and they have experienced similar stuck throttle problems in sub-zero driving temperatures. Independent Audi repairmen have suggested the problem is caused because there is no source of heat (exhaust hose routing or engine cooling routing) near the throttle plate and there is no fix or repair to this design problem. If a crash occurs, the engine heat melts the ice buildup before a cause of accident can be determined. When I contacted an Audi dealership to ask if this is a problem with others and to get repair advice, they were unaware of this problem type and just said to be very careful driving. I also contacted Audi customer service to file a report and they also said they are unaware of this being a problem but did give me a case number (881108347). It is -9 degrees today and -18 is forecast tonight. I am afraid to drive this car in sub-zero temperatures. Next time I might not be on a back country road when the throttle sticks.

See all problems of the 1998 Audi A4 🔎.