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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 11-07-2014, 12:48 PM
CockneyT CockneyT is offline
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Location: UK
 
Join Date: Nov 2014
Posts: 3
Mein Auto: 540i and 528i
528i Decat EML issue

Hi all,

Before anyone shouts I've searched for an answer to my problem but havent really found the correct answer yet Maybe I missed it in my thirst for finding a quick answer. As I understand it, this is a common problem.

In short I have just bought a 528i. The guy has just fitted M5 coilovers and some very nice 19" wheels. He can no longer run the car and was going to break it for parts. It looked to nice to break so I rescued it

Ok, heres the issue.....

The car has had a decat. Ive been told it was remapped due to fuel mix etc. However, I have the engine management light on being caused by the lambda sensors (or lack of so I've been told). What should I do now to correct this and get rid of the horrible glowing EML light.

Thanks in advance for any help received.

Tony
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  #2  
Old 11-07-2014, 03:36 PM
edjack edjack is offline
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Location: San Jose, CA
 
Join Date: May 2007
Posts: 9,702
Mein Auto: '97 540i 6 speed
What's a "decat?" Do you mean removal of the catalytic converters?

The pre-cat O2 sensors are meant to provide input to the engine computer, so that it can control fuel mixture. If the sensors are missing, you will need to replace them to satisfy the computer.

You may need to weld in the bungs if the exhaust pipe no longer has them.
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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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  #3  
Old 11-07-2014, 04:40 PM
pshovest pshovest is offline
BMW CCA 69606
Location: DE
 
Join Date: Dec 2009
Posts: 658
Mein Auto: '10 535iA, '00 528iTM
EML refers to the electronic throttle control. not O2 sensors.
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  #4  
Old 11-08-2014, 03:06 AM
CockneyT CockneyT is offline
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Location: UK
 
Join Date: Nov 2014
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Mein Auto: 540i and 528i
EML is the Engine Management Light and ....yes a Decat is the removal of the catalytic convertors
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  #5  
Old 11-08-2014, 05:50 AM
pshovest pshovest is offline
BMW CCA 69606
Location: DE
 
Join Date: Dec 2009
Posts: 658
Mein Auto: '10 535iA, '00 528iTM
EML is the electronic throttle control....AKA drive-by wire. Terminology issue perhaps?
Are the letters "EML" really lit or are you calling some other symbol EML?

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Quote:
Originally Posted by CockneyT View Post
.....EML is the Engine Management Light and ......
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  #6  
Old 11-08-2014, 07:12 AM
CockneyT CockneyT is offline
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Location: UK
 
Join Date: Nov 2014
Posts: 3
Mein Auto: 540i and 528i
The symbol showing is the engine symbol.....manual states EML. Seems as though the terminology changes according to where the cars were sold
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  #7  
Old 11-08-2014, 01:42 PM
pshovest pshovest is offline
BMW CCA 69606
Location: DE
 
Join Date: Dec 2009
Posts: 658
Mein Auto: '10 535iA, '00 528iTM
If you haven't already, you need to read the codes, all of them.
Pre-cat sensors are easy to install. You will need to determine if this car had post cat sensors. They will be impossible to get working w/o cats.
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