DK Resistance at Pins 6 and 8 ( at DK plug X6360 )

Hi.

After replacing a lot of things that can cause a rough idle ( ignition plugs, distributor, injectors, rotors... checked the intakes, gas pressure,etc,etc ) i think i have just found the root cause...

According to this ...

http://www.bimmerboard.com/forums/posts/564874 and mainly, this
http://www.bimmerboard.com/forums/posts/565036

my understanding is that resistance ( in ohms ) between pins 6 and 8 must be about 2,0 KOhm +/- 800 Ohm...

DK for cylinders 1 to 6 ( the DK at the drivers side ) , shows 3,3 KOhms... ( this is the engine side with less smoke from the exhaust..) while DK at cylinders 8 to 12, shows 2,1KOhm... that looks fine to me...

Do somebody knows if this is correct, and DKs resistance between 6 and 8 should be the one in the previous lines ( 2000 +/- 800 ) ?

Thanks

Couple clues...

Suspicious DK .. left track 1KOhm.... right track ... 2,4HOhm...
The other DK... left track about 1KOhm... right track 1KOhm....

Which one is the good one ?

Thanks.

According to shogun web page...http://twrite.org/shogunnew/fixes/intakesystem.html

http://twrite.org/shogunnew/fixes/intakesystem.html

values should be ( aprox ) these ones...

1990 Left @ idle (closed) : 2017 ohms @ full (open): 1063 ohms
1990 Right: @ idle (closed) : 2065 ohms @ full (open): 1087 ohms

and mines... are

1 to 6.... closed 3,3K, opened... 1,2K ... ( what looks bad... )
7 to 12... closed 2,1K , opened... 1,1K ...

Just to update.. It can be useful if somebody needs this information in the future..

According a bimmerforums member ( Thanks ArnoNym !!!! ) the values shown by my DK are within range due the "monster" tolerance... ( aprox +/- 70% over nominal values.. uffff ). Anyway, i am looking for a DK with similar values to mine....

Hello dudu850!

Today I made some measurements on 5 DKs, to compare the readings.

Pair one, Number 1, Pin 6 to Pin 8:
Throttle closed: 3,10 KOhm
Throttle open: 1,25 KOhm
Pair one, Number 2, Pin 6 to Pin 8:
Throttle closed: 3,21 KOhm
Throttle open: 1,29 KOhm

Pair two, Number 1, Pin 6 to Pin 8:
Throttle closed: 1,95 KOhm
Throttle open: 1,11 KOhm
Pair two, Number 2, Pin 6 to Pin 8:
Throttle closed: 2,36 KOhm
Throttle open: 1,22 KOhm

The single one, Pin 6 to Pin 8:
Throttle closed: 2,49 KOhm
Throttle open: 1,42 KOhm

For a better understanding I attached two clippings, borrowed from Shoguns documents, and added a caption to the schematic diagram.

As well here are some German/English translations for the most important terms:

Betriebsspannung / Operating Voltage
Pruefspannung / Test Voltage
Potentiometerwiderstand / Potentiometer resistor (RN)
Schutzwiderstand, Poti / Protection resistor, Potentiometer (Rs)
Durchgangswiderstand, Schalter / Resistor Security switch (RD) (not literal translation)

My assessment – As the protection resistor, Rs, 1800 Ohm has an unbelievable wide tolerance of +/- 1200 Ohm (min. 600 Ohm to max. 3000 Ohm), the measurements of your DKs meets the tolerance. If the +/- 1200 Ohm tolerance is not a writing error, everything is fine with your DKs.

Best regards
Joachim