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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 02-24-2013, 05:42 PM   #1
merkme19
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Join Date: Feb 2013
Location: mystic
Posts: 47
My Ride: 2003 bmw 325xi
Idle problem

Hi guys I need help with something. Whenever I pull up to a stop sign or am coming off of the highway and push in the clutch, my car idles at around 500rpm then will continuously bounce up and down up to like 2000rpm. What could be causing this? Please help
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Old 02-24-2013, 06:16 PM   #2
White_Knuckles
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Join Date: May 2009
Location: Washington (the state)
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Your ICV or idle control valve may be sticking. Bouncing up to 2000 seems high for that issue. You may have a vacuum leak or something else playing into this.

Usually a good cleaning of the ICV removes goo and deposits and brings them back to life. Not too expensive should it have failed. Servicing it is slightly involved as several steps are needed just to get to it. Use the "Search" feature and read about others with your symptom and the procedure. You may search the General Forum and read several pages of owners talking about this. The 325I is the same engine, nothing unique with our XI's.
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Old 02-24-2013, 06:23 PM   #3
merkme19
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Okay and I don't know if I was exaggerating about 2000 it may have been lower I was just giving a general idea but I will look into that. I thought it would have something to do with the ICV so ill see what I come up with thank you.
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Old 02-26-2013, 09:28 AM   #4
TR4G-
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Is it normal for our cars (manual xi) to dip down to 500 when you step on the clutch and don't press on the gas? Say at a stop light: you're playing with the clutch and gas moving the tiniest bit forward. Then you step on the clutch (without the gas pedal depressed) and the Rpms dip ever so slightly below normal idle and you feel the smallest of shudders. Is that normal?

Not trying to thread jack, just trying to keep the board clean and this is a similar title.
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Old 02-26-2013, 09:37 AM   #5
diM3tri
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Join Date: Apr 2012
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Quote:
Originally Posted by TR4G- View Post
Is it normal for our cars (manual xi) to dip down to 500 when you step on the clutch and don't press on the gas? Say at a stop light: you're playing with the clutch and gas moving the tiniest bit forward. Then you step on the clutch (without the gas pedal depressed) and the Rpms dip ever so slightly below normal idle and you feel the smallest of shudders. Is that normal?

Not trying to thread jack, just trying to keep the board clean and this is a similar title.
The same thing happens to me. It may have to do with the MAF sensor
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Old 02-26-2013, 09:48 AM   #6
2002topasblueM3
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Quote:
Originally Posted by TR4G- View Post
Is it normal for our cars (manual xi) to dip down to 500 when you step on the clutch and don't press on the gas? Say at a stop light: you're playing with the clutch and gas moving the tiniest bit forward. Then you step on the clutch (without the gas pedal depressed) and the Rpms dip ever so slightly below normal idle and you feel the smallest of shudders. Is that normal?

Not trying to thread jack, just trying to keep the board clean and this is a similar title.
It could be spark plugs. My m3 would do the same thing and when I changed my spark plugs it stopped
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Old 02-26-2013, 10:14 AM   #7
SamDoe1
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Quote:
Originally Posted by TR4G- View Post
Is it normal for our cars (manual xi) to dip down to 500 when you step on the clutch and don't press on the gas? Say at a stop light: you're playing with the clutch and gas moving the tiniest bit forward. Then you step on the clutch (without the gas pedal depressed) and the Rpms dip ever so slightly below normal idle and you feel the smallest of shudders. Is that normal?

Not trying to thread jack, just trying to keep the board clean and this is a similar title.
Mine doesn't shudder but the idle does drop down. I think it's the car allowing you more control over your start. If you try it in the summer, the AC will actually disengage when you press the clutch in to start to help you get going and then reengage when you get going.
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