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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 11-29-2012, 12:07 PM
daytradeoil daytradeoil is offline
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Location: Canada's Mexico
 
Join Date: Mar 2010
Posts: 285
Mein Auto: 2001 bmw 525i
Air fuel mixture? Bogging feeling

2001 525i

The plugs were replaced probably 25k miles ago not sure what brand.

So when I drive at lower rpms I get a bogging feeling. Usually when cruising between 35-40mph.

The get up and go from a stop I do not feel it.

Not sure what exactly the issue is I have no check engine lights on. I have had the issue for a while but it's recently annoyed me more and want to figure it out.

I was thinking air fuel ratio issue/lack of a strong enough spark?

I dont think it's the tranny or susp. Just feels like an old carbuerated car with its mixture off at times. Ideas?

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  #2  
Old 11-29-2012, 02:28 PM
uncmozo uncmozo is offline
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Location: upstate NY
 
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Posts: 307
Mein Auto: 2002 530i 5 speed
DISA valve? Or vacuum leak.
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1995 525i 5 speed - sold at 225,000 miles
2002 530i 5 speed - 160,000 miles
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Old 11-29-2012, 02:39 PM
edjack edjack is offline
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Location: San Jose, CA
 
Join Date: May 2007
Posts: 8,332
Mein Auto: '97 540i 6 speed
Go here and compare your symptoms: www.beisansystems.com
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Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
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