Throttle position sensors on a 1987 Audi 4000 Quattro

[dvanden46 at gmail.com]

Does anyone know the correct way to check the throttle position sensors on the throttle body of a 1987 Audi 4000 Quattro?  If someone could tell me the specifics I would appreciate it.  I think I did it right using a multi meter but I am unsure.  I set it to ohms and I checked the resistance by placing the red probe on the outside contact of the plug and the black probe on the middle one. This was with the throttle at idle. There was no reading.  Likewise there was no reading when I placed the red probe on the inside contact and the black probe on the middle contact.  I believe they were both supposed to read zero under the circumstances.


With the throttle open and the full throttle switch activated I got a reading in the 20’s or something for the full throttle switch, but I believe it was supposed to be zero.  All this makes me think that the sensors are duds.  But, if someone could confirm how to properly test and what are correct readings I would appreciate it.  Also, if anyone has found micro switches that can be used to replace the faulty ones (assuming they are faulty) so I don’t have to buy another throttle body, please tell me where they can be gotten.


Sincerely,


David Vanden






Sent from Windows Mail

---
This email has been checked for viruses by Avast antivirus software.
http://www.avast.com