1985 Audi 4000S running rich...
 

My car is due for the smog test again, but it it is running rich when
cold. Most likely it will not pass!

If somebody has had similar problems, perhaps they can post some tips
for possible remedies.

Thanks!

Re: 1985 Audi 4000S running rich...
 

Martino,
If it is equipped, you should replace the oxygen sensor on the car - you can
do that cheaply using a generic Bosch one and splice it into the Audi
harness connector on your old sensor. The car may also have a problem with
the thermo-time sensor - activating the cold start injector and richening up
the mixture for an unnecessarily long time. You should get your hands on a
Bentley manual for the car if you're going to troubleshoot the fuel system
by yourself.
Cheers!
Steve Sears
1987 Audi 5kTQ
1980 Audi 5k
1962 and '64 Auto Union DKW Junior deLuxes
(SPAM Blocker NOTE: Remove SHOES to reply)
"martino" <jhl@x.vgf> wrote in message
news:plqli1hkrdhs8s3u9bs0kcv2movthidlv4@4ax.com...
> My car is due for the smog test again, but it it is running rich when
> cold. Most likely it will not pass!
>
> If somebody has had similar problems, perhaps they can post some tips
> for possible remedies.
>
> Thanks!
>
>
>

Re: 1985 Audi 4000S running rich...
 

Check your cold start engine temperature sensor.

martino wrote:
> My car is due for the smog test again, but it it is running rich when
> cold. Most likely it will not pass!
>
> If somebody has had similar problems, perhaps they can post some tips
> for possible remedies.
>
> Thanks!
>
>
>

Re: 1985 Audi 4000S running rich...
 

On Fri, 16 Sep 2005 16:18:34 -0400, "Steve Sears"
<steve.sears@SHOESsoil-mat.on.ca> wrote:
Thanks, will check into these items. I believe it already has a fairly
new Bosch oxygen sensor, but the ctalic converter is a cheap $75
dollar type. Perhaps that may be the problem as well.

Thanks again.
>Martino,
>If it is equipped, you should replace the oxygen sensor on the car - you can
>do that cheaply using a generic Bosch one and splice it into the Audi
>harness connector on your old sensor. The car may also have a problem with
>the thermo-time sensor - activating the cold start injector and richening up
>the mixture for an unnecessarily long time. You should get your hands on a
>Bentley manual for the car if you're going to troubleshoot the fuel system
>by yourself.
>Cheers!
>Steve Sears
>1987 Audi 5kTQ
>1980 Audi 5k
>1962 and '64 Auto Union DKW Junior deLuxes
>(SPAM Blocker NOTE: Remove SHOES to reply)
>"martino" <jhl@x.vgf> wrote in message
>news:plqli1hkrdhs8s3u9bs0kcv2movthidlv4@4ax.com.. .
>> My car is due for the smog test again, but it it is running rich when
>> cold. Most likely it will not pass!
>>
>> If somebody has had similar problems, perhaps they can post some tips
>> for possible remedies.
>>
>> Thanks!
>>
>>
>>
>