In addition to the below mentioned, this morning,  outside temp 35ish, the
van ran great.  HOWEVER, I did notice that the rpm never fell below 2000.
I could get it below by "gunning" it rapidly, but when I raised it slowly
to above 2000 and took my foot off like normal, it was come down to and
stay at 2000rpm.  If I shut off and restart the van, it would idle @ 900. (
O2 sensor still disconnected)

> I have a 87 Vanagon with a digfiant efc.  Now that the cold weather is
upon
> us in Chicago, the sytem is running terrible.  The fuel consumption is
> around 16.1mpg (automatic) and the tailpipe is very sooty. ( had been
> 18mpg)   The engine is surging/chugging and stalling frequently.  I
> disconnetcted the O2 sesonrs with no better results.  I also  checked the
> temp sensors and they were resonable,( as I did not have the exact temp).

> Any ideas ?  The O2 sensor is the 3 wire type, and the collant temp
sensor
> were new in the summer (I know, that meaningless)
>
>
>
> Thanks,
>
> Larry