In the event you haven't resolved this yet, try warming the engine up, then
disconnect the O2 sensor. Next drive it some. With the engine warm, it
should idle ok when you stop at stop signs, and should run smooth at highway
speeds. If it kicks and bucks under these set up conditions you probably
need to replace the O2 sensor.

With the engine warm and the O2 connector unplugged from the O2 sensor, it
is a good time to check your idle speed as well. Can't remember exactly but
I think the Bentley calls for 900 rpm at idle. It should hold at a steady
RPM.

When the engine is cold, if the O2 sensor is disconnected, the engine will
not idle. It is during cold start and cold idling that the O2 sensor does
its job if working properly.

Hope this helps.

John Rodgers
In Birmingham, AL

Rob & Lrae Winterkorn wrote:

> My wife is making her way back from Florida in our 90 GL. It is bucking
> very bad.
> She said it did it a couple of times on the way down, so I had her
> (handy chick that she is) remove and clean all connections with sand
> cloth and contact cleaner. She found several rough connectors that
> cleaned up very nicely including: oxygen sensor, brain under back seat
> and afm.
> Is there anything else I can have her do?
>
> Or who outside of Chattanooga Tenn. is trust worthy.
>
> Her description is out of no where it is like the van gets shut off than
> back on again.
>
> THANKS FOR ANY TIMELY HELP.
>
> Rob