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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 07-19-2014, 10:30 AM
Nikolai Nikolai is offline
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Location: Los Angeles
 
Join Date: May 2014
Posts: 69
Mein Auto: 2003 BMW 530i
Engine/transmission PROBLEM

Hey guys, when I drive the RPMs drop (couple hundred) and go back up to normal. This happens a few times in a row and then car seems to drive fine. Happens more often when I set the cruise control. I started blaming it on that but this also happens without it.

The feeling is as if the car is running out of gas ( I got a full tank of 91).

Fuel pump?
Computer?

What could it be???

Thanks
2003 530i sport


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  #2  
Old 07-19-2014, 02:07 PM
edjack edjack is online now
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Mein Auto: '97 540i 6 speed
Fess up to the rocket attack!

Report any pending codes.
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  #3  
Old 07-19-2014, 02:11 PM
Nikolai Nikolai is offline
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Mein Auto: 2003 BMW 530i
No codes


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Old 07-19-2014, 04:30 PM
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matt540 matt540 is offline
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Is it while your braking?

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  #5  
Old 07-19-2014, 04:32 PM
Nikolai Nikolai is offline
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Mein Auto: 2003 BMW 530i
No. When I'm driving @20-40mph. Haven't tried on the freeway
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  #6  
Old 07-19-2014, 06:29 PM
deanspedale deanspedale is offline
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Mein Auto:
Unfortunately without having codes, you may have to start looking from the most obvious such as fuel pump, plugs...small stuff is usually the answer with something like this. Also if it come down to it you may want to look at the inside of your coil packs for erosion( many people see plugs to be the problem when sometimes it's this). Just a few ideas for you to maybe look into. Good luck.

Long time owner of 2 e39s


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