Sticky Throttle - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

 
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#1 (permalink) Old 04-03-2008, 02:36 AM
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Sticky Throttle

Hi,

I've a 2001 e46, 318ci sport.

The throttle seems very stiff sometimes, particularly on a cold or rainy day. Anything that is 12+ and the sun is out then it's generally ok. My model unfortunately doesn't benefit from the Fly-By-Wire system and still uses the conventional cable throttle assembly.

Symptoms:
Upon pushing the accelerator pedal is slightly resists and then nudges on past and is smooth thereafter, as if something is blocking. As you can imagine, this isn't desirable for smooth acceleration. My mechanic has 'lubed' the springs etc on the throttle area before which has helped but it eventually wears off.

Upon inspecting the throttle assembly when the engine is running, the pedal is resistant at first as is the assembly when you push it gently. when the engine is off both the pedal and throttle assembly are perfectly smooth. odd

Any suggestions are welcome.
Phil

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#2 (permalink) Old 04-03-2008, 06:26 PM
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You will have to take the body off to have a better look...
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#3 (permalink) Old 04-04-2008, 07:58 PM
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The throttle cable can become worn and frayed internally, causing it to stick on its outer caasing. try removing the cable from the throttle body and move the throttle be hand to see how it feels. if it feels ok, try it from in the car and see if any resistance can be felt in the cable and peddle. Also, the internal throttle butterfly can choke up. u can try removing the throttle body and cleaning and lubricating the butterfly itself. hope this helps.
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