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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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Old 11-10-2005, 10:50 AM   #1 (permalink)
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Unhappy E46 - Idling Problem

Hi - I have a 318i. When I take my foot of the accelerator, the revs drop easily to about 1200 then rise slightly and then over about 5 seconds, slowly drop down to where it should be at about 800. Has anyone any idea what the cause might be?

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Old 11-10-2005, 12:41 PM   #2 (permalink)
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check for an air leak around the air filter and relevant pipes

use some washing liquid smeared around the outside of the varoius air pipes....any bubbles will show u where any leak is
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Old 11-10-2005, 12:43 PM   #3 (permalink)
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I would start with looking for a vacuum leak, it's the easiest, simplest and cheapest place to start. This could be anything from a loose intake boot at the throttle body to a leaking vacuum hose under the intake or even a failing crank case vent valve.
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Old 11-11-2005, 11:08 AM   #4 (permalink)
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erm,,,didnt i say that???
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Old 11-11-2005, 02:41 PM   #5 (permalink)
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yeah you did. At the time I was typing the reply, you hadn't posted.. nobody had. We were replying at the same time... look at the time stamp
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Old 11-12-2005, 01:31 AM   #6 (permalink)
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at least we are on the same level

too many ppl on this forum will say the worst case scenario ....

extech is right...look for the easy option 1st...if not come back and we will start again






sry extech
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