Oxygen Sensor

[David Vanden]

Well I am pretty sure I got them wired correctly.  The only problem, as I
mentioned is that they are not reading infinite when open.

 There has got to be a way to locate vacume leaks that does not require
buying a smoke machine.  However, if I did is there a model that you
recommend.  They come in all shapes and sizes and prices on EBAY.   Anyway,
I will debate it more in the morning.

David

On Tue, May 26, 2015 at 8:17 PM, Huw Powell <audi at humanspeakers.com> wrote:

> Well, they are just switches.
>
> When closed they should read zero or as close as possible (definitely less
> than one ohm).  When open your meter should just read off scale/infinite.
>
> They won't "vary" anything, the idle switch tells the ECU to use the ISV
> to maintain about 800 rpm (and kills fuel if it is above ~1400 rpm). The
> WOT switch tells the ECU to go into open loop with a richer mixture for
> enhanced acceleration.
>
> - Huw
>
> I hope you got them wired correctly.
>
>
>  I soldered a set of the throttle body switches I got.  Unfortuneately,
>> they read they had some resistance as opposed to being infinite when the
>> switches were not activated.  I don't know what happened to them in the
>> process of pairing and soldering them.  However, they were both at a
>> perfect 0 when activated so I used them.  I don't think they would
>> increase the idle?
>>
>> This is a 1987 Audi 4000 Quattro.
>>
>