Hi Robert

The O2 sensor fine tunes the mixture, however the engine should run close to
the correct mixture (maybe a little rich) without it.

I would look to see if the Temp 2 sensor is working and connected (wiring
check), throttle position switch setting and Intake air sensor in the AFM.

Dave

'86 Westy

On 19/07/09 12:24 PM, "Robert Stewart" <robertmstewart@MAC.COM> wrote:

> So my rebuilt engine is in, started on the first try but it's running
> rich.
>
> Any ideas?
>
> It as the original AFM, Idle control valve, stabilizer unit, and
> oxygen sensor, etc..
> Could it be as simple as I need a new O2 Sensor?
> if so should I get the splice in kind or the whole wire?
> My mechanic tells me that it might be the wire from O2 sensor from all
> the years of replacement slicing..
> http://www.van-cafe.com/home/van/smartlist_985/oxygen_sensor.html
>
> My mechanic tells me the original Breather Tower top comes off to
> easily.
> He opened and the top inner components of the unit seem to be
> deteriorating.
> Does it require replacement at $90 for the unit or can it refurbish it
> somehow and seal the top?
> http://www.van-cafe.com/home/van/smartlist_924/breather_system.html
>
> Thanks,
> Robert
> NY