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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 05-03-2007, 12:58 PM
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justtune justtune is offline
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Mein Auto: 1997 528IA
Idle low after startup...E39 97 528i

same symptom as posted from prior person but didn't help me too much "When I first start my car in park in idles perfectly smooth at about 700-800 rpms. When engaged in reverse it is particularly rough feeling through the steering wheel and even a little through the body (reverse with foot on brake). " and dome light gets dimm and bright like engine is about to die (than it did died). Anyway I replace plugs, no engine check light, had orig battery from the beginning... is there way to increase the idle? or to fix this problem? with out costing a $$$
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  #2  
Old 05-03-2007, 02:12 PM
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jda2000 jda2000 is offline
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Mein Auto: '02 530i sport black
clean the ICV
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  #3  
Old 05-03-2007, 02:24 PM
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justtune justtune is offline
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I will try that tonight...
Thank you
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  #4  
Old 05-03-2007, 06:58 PM
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justtune justtune is offline
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okay got it...clean ICV and idle still running low
any other thought?
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  #5  
Old 05-03-2007, 07:01 PM
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razzy530 razzy530 is offline
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just a question, HOW DO YOU CLEAN THE ICV?
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  #6  
Old 05-04-2007, 10:10 AM
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carb cleaner... you can pickup at local auto shop stor
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  #7  
Old 05-04-2007, 01:29 PM
KTrostel KTrostel is offline
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Have you checked for an air leak between the MAF and throttle body or a vacuum leak somewhere after the throttle body (intake)?
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  #8  
Old 05-04-2007, 02:20 PM
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I took the MAF apart so many times... I didn't see any air leak... if there were any air intake between the MAF and the body... I think idle would run higher than 200~400
- Stuff I checked this morning... I unplugged the ICV pipe going to MAF and plenty of air was sucking in...If I would block the pipe... idle would run little higher.. let go, idle would run low.
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  #9  
Old 05-06-2007, 09:33 AM
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justtune justtune is offline
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Well this morning I got the ICV out again... clean untill I can hear clinking noise... well guess what... it's working now...
full speed!!!!!

Thank you for your help
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  #10  
Old 05-12-2007, 11:32 PM
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OK got the pictures for removing the ICV
Fresh copy today...
PICT0381.jpg just picture of my 97 528i
PICT0382.jpg yellow lines are the removing points
PICT0383.jpg yellow unscrew
PICT0384.jpg look after removing MAF
PICT0386.jpg remove 2 torque screws from throttle body
PICT0387.jpg remove 4x10mm bolts
PICT0388.jpg remove 2x10mm bolts screwed into black metal strap. ICV holder... Pull the ICV down and remove from location
PICT0389.jpg disconnect the electrical plug on the back side of the ICV by depressing the retaining clip and pulling it out, loosen the clamp screw and remove the hose attached to the ICV
PICT0391.jpg once removed the this is what should look like... clean it well with Carb cleaner... also make sure it's dry inside
Assembly is reverse
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  #11  
Old 05-13-2007, 12:03 AM
BIGLEFT BIGLEFT is offline
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dude your the man wow what a bitch to get to huh...so its under the throttlebody ok thnx alot you helped out huge
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  #12  
Old 05-13-2007, 12:10 AM
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that is a royal pain just ot get to the ICV...
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  #13  
Old 05-13-2007, 08:03 AM
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well after taken apart 2 times... 5 ~ 8 min tops
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  #14  
Old 05-13-2007, 08:47 AM
540_n00b 540_n00b is offline
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Mein Auto: 97 540i
540i icv is so much easier
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  #15  
Old 05-14-2007, 02:24 AM
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Mein Auto: 1987 535i; 1998 528i; +
My fuel milage in all city (orlando) driving has improved from 14.7 mpg to 17.6 mpg + by replacing front Os2's (10 percentage point improvement), cleaning Throttle Body and ICV with carb cleaner, adding Lucus fuel injector cleaner and installing 6 new NKG plugs. With a little mix of freeway driving thrown in and I'm up to 18.7 mpg.

Much better!!
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  #16  
Old 05-14-2007, 05:42 AM
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I'm thinking O2 sensor this weekend...
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  #17  
Old 05-14-2007, 05:56 AM
Solo1 Solo1 is offline
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Mein Auto: 1987 535i; 1998 528i; +
i've read that only the front two really matter as far as fuel mileage goes.
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  #18  
Old 07-30-2010, 08:28 AM
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Bookmarked!
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