sounds like a bad oxygen sensor, temp2 or fuel pressure regulator. First
unhook the oxygen sensor and drive it w/o one. It will run a bit rich, but
shouldn't give much noticable smoke. I bet it's the oxygen sensor. Maybe
it wasn't re-connected???
matthew

Matthew Pollard          "Racing with the wind and flirting with death
Dept. Of Chemistry        So have a cup of coffee and catch your breath"
University of Idaho
www.uidaho.edu/~poll7356

On Fri, 19 Apr 2002, kevin obrien wrote:

> Greetings all and thanks to those who've sent helpful
> suggestions.
>
> Having limped the Vanagon home after picking it up at
> the mechanics (and laying out some SERIUOS coin)..she
> was running rough, blowing the black exhaust...all of
> which weren't present in the shops driveway but
> started up once a got her up to 50+mph.
>
> Anyway....she sat overnight...I started her up to take
> her back and she ran reasonably well on the slower
> back roads...didn't notice any of the rich-running
> symptoms...so before I got her back to the mechanic I
> took her down the highway at 60+...soon started
> bucking and blowing exhaust, running rough..even
> stalled.  Started her up...drove back at 40-50mph and
> she ran ok again.
>
> So...it seems now that she is developing the symptoms
> at higher revs/speeds.
>
> Suggestions anyone????
>
> kevindobrien@yahoo.com
> '90 Vanagon (from Hell!)
>
> Quote of the day:
> "Did you ever feel like the world is a tuxedo...and
> you're a brown shoe?"
>                               - George Gessel
>
>
>
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