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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 01-23-2011, 06:09 PM
theroosh686 theroosh686 is offline
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Location: Ridgefeild Washington
 
Join Date: Dec 2010
Posts: 12
Mein Auto: 1998 e39.
Exclamation e39 Fluctuating Idle,black smoke and loss of power. HELP!

My recently bought e39 540i sport 98' with about 150 thousand miles is acting up!

On cold start the idle fluctuates form about 500 to over 1000 rpm. It jumps up and down but the longer it idles the better it starts to get. After about 5-7 min it evens out and seems to be normal again.

The engine also shakes a bit when and there is black smoke coming out of the exhaust!

When pushing down on the gas while in drive it sometimes loses power for a sec then jerks and accelerates rapidly.

The check engine comes on and off but i will post codes later. (possibly tmrw?)

ANYTHING HELPS! THANKS>
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  #2  
Old 01-23-2011, 09:23 PM
theroosh686 theroosh686 is offline
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Mein Auto: 1998 e39.
so no one has any idea what this might be?
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Old 01-23-2011, 09:45 PM
98540iA 98540iA is offline
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Location: Rocky Mountains
 
Join Date: Nov 2010
Posts: 332
Mein Auto: '98 BMW 540iA (born 9/97)
Have you cleaned your ICV lately? That could fix your idle issue if it's gummed up.... very easy job.
Black smoke sounds like burning oil, which most commonly seems to be the CCV, or rear manifold cover (on the rear of the intake manifold, the black box thing with a few hoses coming out of it). Lots of DIY links on replacing this, and I think it's $200-$300 part.
First, you need to scan and report back with codes. The codes will tell you what is happening to cause the CEL so before replacing any parts make sure you get the codes.
hope this helps.
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Old 01-23-2011, 11:06 PM
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first540i first540i is offline
my first bmw
Location: SGV, CA
 
Join Date: Jan 2011
Posts: 338
Mein Auto: e39
^ i didnt know that the rear manifold cover gasket might cos black smoke.. well need to check up on that in my car too.


i would suggest you taking off your intake manifold, replace all the gaskets, clean it, and see what happens.

Last edited by first540i; 01-23-2011 at 11:07 PM.
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  #5  
Old 01-23-2011, 11:47 PM
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bluebee bluebee is offline
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Location: San Jose, California
 
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Posts: 21,106
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by theroosh686 View Post
so no one has any idea what this might be?
Hmmm... I once googled for someone "white smoke BMW E39" and found these threads which I put into the VERY best of E39 Links to help others:
- Diagnosis of white smoke out of your exhaust pipe (0) (1) (2) (3) (4) (5) (6) (7) (8)

Some of those threads, IIRC, also cover "any smoke" coming out of the tailpipe ... but ... what I recommend ... (since I haven't done it myself) is for you to google for "black smoke BMW E39" and then list for us the threads you find most applicable.

Then, given those best-links, we can put them in the VERY best of E39 Links so that others benefit from the effort (as is always our mantra).

Let us know what links help you out best!

Good luck. Sorry I can't help more.
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Old 01-23-2011, 11:49 PM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
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Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by theroosh686 View Post
On cold start the idle fluctuates form about 500 to over 1000 rpm.
Well, in the VERY best of E39 Links we have the following diagnostic trees which may be of help to you ...

- How to diagnose a BMW E39 engine misfire (1) & a cold-engine intermittent misfire (1)
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  #7  
Old 01-24-2011, 06:06 AM
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Fudman Fudman is offline
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Location: Sudbury, MA
 
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Mein Auto: '02 530i Sport auto
Quote:
Originally Posted by theroosh686 View Post
so no one has any idea what this might be?
You need to post the codes. Otherwise we are just guessing.
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  #8  
Old 01-24-2011, 06:21 PM
theroosh686 theroosh686 is offline
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Location: Ridgefeild Washington
 
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Mein Auto: 1998 e39.
Thnks. and yes codes coming soon.
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Old 01-29-2011, 07:47 PM
theroosh686 theroosh686 is offline
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Location: Ridgefeild Washington
 
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Mein Auto: 1998 e39.
UPDATE!
so i got my codes ran at autozone and this is what i got.

p0300-?
p0305- misfire cylinder 5
p0304- misfire cylinder 4
p0100-?
p0111-?
p1585-?

( the codes with the ?= the guy at auto zone gave explanations for all but i noticed he only ran two of the codes under bmw, the others were explanations and probable causes for other oem brands like Volkswagen and "domestic". He did say they were going to be close explanations but i just dont trust him so i wanna find out exactly what the codes mean bmw wise.) makes scene? ^

I also found a couple leaks in my air intake pipe and a few hoses were leaking air,fixed and replaced. all right next to the maf leading to the icv . also cleaned icv. and now NO MORE BLACK SMOKE OR WEIRD FLUCTUATING IDLE!!!!!! Codes still remain.

the car idles at about 1100-1200 rpms now. is this high? how do i turn in down. pictures please!!!!!!!!!!!!!!!!!!!!!!!!! where is it located.

thnks to all, earlier replies helped me alot! sorry for the bmw lingo, im a nube when it comes to explaining things.
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Last edited by theroosh686; 01-29-2011 at 07:50 PM.
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