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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 11-14-2012, 10:48 AM
justanewbie justanewbie is offline
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Location: England
 
Join Date: Nov 2012
Posts: 3
Mein Auto: '01 540iA Sport;'99 740i
Angry M62 engine timing

Hi All,

I had to do the infamous chain guides on my car and a friend offered to do this whilst I was working away. He did it all, except he did not use the proper timing tools to re-time the engine.

Anyway, since then, I have re-timed the engine several times, the last time with the assistance of a BMW specialist (using the appropriate tools).

It is now smooth as silk, however, still running rich by way of observing the fuel trims.

From a cold start it goes from 0 to -15 on the Short Term Fuel Trims. The Long Term Fuel Trim is about -13 on bank 1 and -14 on bank 2... not enough to trigger the Engine Management Light but still not great.

Other bits I have done/replaced are:

- replaced 2 front oxygen sensors with new Bosch ones.
- tried another MAF.
- replaced intake manifold gaskets
- replaced vent pipe under intake manifold
- replaced rear crank case vent valve
- replaced fuel filter with regulator.
- replaced the valley pan.
- swapped over injectors from a M62TU 740i facelift.
- 2 x new BMW cam sensors

The following is a video monitoring the fuel trims after warm-up and driving a short distance:

Fuel Trims


Following is focusing on rear (post-CAT) O2 sensor voltages:

O2 sensor voltages - rear

Help appreciated!

Last edited by justanewbie; 11-15-2012 at 05:11 PM. Reason: edit links
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  #2  
Old 11-16-2012, 10:58 AM
justanewbie justanewbie is offline
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Location: England
 
Join Date: Nov 2012
Posts: 3
Mein Auto: '01 540iA Sport;'99 740i
Anyone?
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