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Re: eml and dk again (archive)

[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]

Posted by Dean Halter on August 07, 2001 at 20:39:37:

In Reply to: eml and dk again posted by T.Erm on August 07, 2001 at 13:40:49:

I think the source of the trouble is the carbon resistor that is used to sense the throttle position and form the feedback network for the computer to precisly position the throttle. It sounds as though the small wiper attached to the throttle that contacts the resistor has worn through the carbon. This is probably why the failure is related to throttle position (and the car spends most of its time at low throttle openings). There is an article (not for the inexperienced...) at volume 18 issue 2 and volume 19 issue 9 that outlines a procedure to recover the carbon resistor. I am interested to know of your original repair procedure as I have taken two of them apart (the two originals) and messed them both up. I have tried one more round of dissassembly/reassembly but haven't tried them yet to see if they work- spares you see? It would be interesting to see what I did wrong (besides taking them apart when they were working correctly!!!) Ciao, Dean.

Hi All!

Today I got the EML again after quite a while of perfect driving
since I dissasembled one of the dk motors.

I tryed a few thing today and found some interesting behaviours.

Normal operation when you switch on the ignition is
that the EML goes on and the dk's make a quick twist.
I assume this is a test. depending on this test the eml
goes off or as in my case it only goes of for 0.5s an then
remains on.

However, if I pressed down the accelerator a little bit
when switching on the ignition it was OK.

I could even start the engine and keep it running as long
as the rpm was high enough. Decreasing the rpm slowly
made the EML go on around 1000rpm.

This was how I came home actually. started it at around 200rpm
and then drove in 1st gear. My limp mode is very weak.
I can't go up any hiils.

Another observation i made was when I managed to keep it at
1000rpm and had a look at the dk's.
The right one was perfectly steady while the left one gave
a nervous and jumpy impression.
It this a clear indication of a bad dk?

Can anyone explain the accelerator influence?


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