i might suspect a worn out afm carbon track at the lower end near idle.
if you have a known good spare try swapping it out.

jonathan

On Mon, 10 Apr 2006, Loren Busch wrote:

> Okay, got a mystery problem, looking for ideas as to what's going on.  Vehicle
> is a stock '90 Westy, stock 2.1L w/Digifant, automatic transmission. Work
> just done:  Set of rebuilt injectors installed, new Bilsteins in the front,
> rear brakes inspected and adjusted, emergency brake adjusted.
>
> Runs fine at startup, cold.  In just a minute or two, as warming up, and
> then on, two things occur.  First, when coming to a stop or starting from a
> stop there is slight shudder to the van just as it stops moving, just as it
> starts moving.  It feels a lot like clutch chatter, but no clutch, it's an
> automatic.  But the big problem is no power when starting from a stop.  Once
> rolling, but accelerating very slowly, and the revs get to about 2k,
> everything is great, runs fine, plenty of power.  If I had a carburetor, I'd
> say it was the accelerator pump, that's the way it feels.
>
> Checked the tranny fluid, all up to the marks.  Oil okay.  There was no sign
> of this before the work, never had anything like it in four plus years of
> driving this van.  Has to be, in my mind, one of three things:  Something in
> the FI system got unplugged during the work, there is something wrong with
> all four injectors (not likely) or, and this seems absurd, the rear brakes
> are doing something weird after the adjustment, like hanging or dragging.
>
> Anyone recognize these symptoms?
>
>
> --
> Loren Busch
> "I ordered a feast in the hope that you would come."
> "I came in the hope there would be a feast."
> (From "Monument" by Lloyd Biggle Jr.)
>
>
>