1989 2.5 m20 high idle, motronic chipped

[e30dubz]

hi, i'm having trouble with my idle, its revving at 1500 on cold start, and as soon as i touch the throttle it rises to 3000 and then drops to 2000 after a short drive, i have tried moving the throttle position sensor plug and seems to slow down to 1500, but now doesn't change when i try that any comments would be good on that subject.

i have just looked at the ecu and looks like it has chip, i was wondering if anyone could shed any light as to what type it is.

motronic- 0 261 200 173
chip-co5e / C78-2 hard to read

[Speedtouch]

Welcome to the Zone!

This Wiki guide may be helpful:

http://www.e30zone.net/e30zonewiki/inde ... ake#Idling

Check that your throttle cable is working as it should, and not binding.

The standard BMW chip has a silver label on with a part number, e.g., 1 267 356 425. An aftermarket chip will usually have a white label with some form of ID code. A photo of it may help us identify it.

[e30dubz]

thanks for the welcome, and I will have a look at wiki and check the cable

http://i1368.photobucket.com/albums/ag1 ... 693ac0.jpg

Trying to do this on my phone and not use to the forum yet. Cheers Danny

[Speedtouch]

Certainly looks like an upgrade chip, possibly one of Ant's (a Zoner). You could try PMing him with the pic and see if he recognises it...

[e30dubz]

Ok cheers