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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 11-18-2011, 05:12 PM
Dents Dents is offline
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Location: Tulsa, OK
 
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Mein Auto: 2000 540i 6 speed
540i 6 speed hesitation at low RPM??

just started doing this and initially felt like clutch slipping. with clutch engaged and at 1000 rpm then accelerate there is a hesitation. will do this in any gear at low rpm. hopefully this makes sense... not sure where to start. thanks in advance!
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  #2  
Old 11-18-2011, 05:13 PM
Dents Dents is offline
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Mein Auto: 2000 540i 6 speed
2000 e39 540
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  #3  
Old 11-19-2011, 09:21 AM
JimLev JimLev is offline
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Mein Auto: 540/6, S60 Volvo, Tribeca
If it was the clutch slipping you would really notice it in the higher gears accelerating up a hill.
Do you have a SES (CEL) light on?
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Old 11-19-2011, 09:26 AM
SNAKEYES86GT SNAKEYES86GT is offline
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Mein Auto: '01 540i Sport
I have a similar issue - I was planning to start with cleaning my MAF sensor as the car seems to idle and rev well with it disconnected. Now if I could only find the right TORX bit...
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Old 11-19-2011, 09:29 AM
SNAKEYES86GT SNAKEYES86GT is offline
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I forgot to mention; mine feels more like a lurch in the drivetrain and not a clutch issue, like the OP mentioned. Could spark plugs/MAF/dirty injectors be the culprit for the OP?
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Old 11-19-2011, 11:35 AM
JimLev JimLev is offline
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Mein Auto: 540/6, S60 Volvo, Tribeca
The MAF screws are security 5 point torx, good luck finding that bit.
I used a pair of pliers to grip the outside edges of the screw.
When I got them out I threw them away and used phillips head screws.
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  #7  
Old 11-19-2011, 12:02 PM
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540indiana 540indiana is offline
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Quote:
Originally Posted by SNAKEYES86GT View Post
I have a similar issue - I was planning to start with cleaning my MAF sensor as the car seems to idle and rev well with it disconnected. Now if I could only find the right TORX bit...
You dont need a torx bit. Find the smallest pair of channellocks you can find. The width on the channel locks I used were no wider than 1/4 inch.
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Old 11-20-2011, 07:25 AM
Dents Dents is offline
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Update with some info.... no check engine light coming on. took the car out yesterday and here is what was happening. driving in 2nd gear at 1000 rpm and accelerate. car will studder then fine and it really feels like some kind of clutch or gear slipping. its weird. also at 50 mph in 6th gear it does an initial studder when i accelerate then fine at any other higher rpm it is completely normal. tried to make the clutch slip and it is like new. guess the questions i have is is it mechanical or electrical/air issue. if it is electrical/air issue wouldnt i be getting a fault code? thanks guys for the input!!!
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  #9  
Old 11-20-2011, 10:03 AM
Quick99Si Quick99Si is offline
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gears don't slip and a slipping clutch will slip consistently (gear, rpm, load).

Common causes for your issue are oil separator, maf, vacuum leak. sometimes they trip a light, sometimes no. Either way, get the car scanned for stored errors. Harbor Freight sells a huge kit of security bits for 10 bucks, it includes the correct bit for our MAFs.
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