Re: Oxygen sensor problem
 

Hi!
I forgot to mention one thing earlier...
When the engine is cold it idles at aprox. 1200 - 1300 RPM.
After about two minutes it drops to about 860 RPM.
Is this nomal or should it be idling at 860 right away?
Thanks!

Re: Oxygen sensor problem 1996 A4 1.6
 

>From: "Loki" loki@feetmate.com
>
>Hi!
>It's 1996. I hooked up vag-com to it but I don't have the correct label file
>for my engine,
>so I'm not sure if I'm looking at the correct measuring block. I shows a
>value of around 0.5 V
>and it fluctuaes... It drops to 0.0 then comes back to 0.5 and so on...
>BTW I was also looking at another measuring block that is showing four
>voltages.
>These voltages are not the same, and they change as the RPM change,
>but when I rev up the engine to about 4000 RPM they equilaze and stop at
>5.100 V.
>Do you know what this could be?
>

Did you introduce a vacuum leak, like the tests in those websites, to see how
the values change?

Also you may have to make sure any grounds are clean and tight. I have seen
some earlier VWs and Audis with bad grounds that stopped the 02 sensor from
functioning.

I am not sure but 5.100 V does not sound right, but are you checking this with
the vehicle in motion? I am also not sure of your FI system either! 8^)
IIRC In the USA, most 1996 vehicles have OBD-II with 2 Oxygen Sensors sensors.

later,
dave
Reminder........
Before you criticize someone, you should walk a mile in their shoes. That way,
when you criticize them, you are a mile away from them, and you have their
shoes. Frieda Norris

Re: Oxygen sensor problem 1996 A4 1.6
 

>From: "Loki" loki@feetmate.com
>
>Hi!
>It's 1996. I hooked up vag-com to it but I don't have the correct label file
>for my engine,
>so I'm not sure if I'm looking at the correct measuring block. I shows a
>value of around 0.5 V
>and it fluctuaes... It drops to 0.0 then comes back to 0.5 and so on...
>BTW I was also looking at another measuring block that is showing four
>voltages.
>These voltages are not the same, and they change as the RPM change,
>but when I rev up the engine to about 4000 RPM they equilaze and stop at
>5.100 V.
>Do you know what this could be?
>

Did you introduce a vacuum leak, like the tests in those websites, to see how
the values change?

Also you may have to make sure any grounds are clean and tight. I have seen
some earlier VWs and Audis with bad grounds that stopped the 02 sensor from
functioning.

I am not sure but 5.100 V does not sound right, but are you checking this with
the vehicle in motion? I am also not sure of your FI system either! 8^)
IIRC In the USA, most 1996 vehicles have OBD-II with 2 Oxygen Sensors sensors.

later,
dave
Reminder........
Before you criticize someone, you should walk a mile in their shoes. That way,
when you criticize them, you are a mile away from them, and you have their
shoes. Frieda Norris