The most likely scenario is that something is causing your engine to
run lean, which is preventing low-speed idle.

Possible causes:
  - vacuum leak on one of the vacuum line connectors
  - air intake boot cracked or one of the connections not on good
  - fuel/air mixture screw on AFM not set properly
  - air leaking in through black rubber crankcase breather tube due to
faulty rubber internal flap in black plastic tower on your crankcase

Other stuff:
  - injectors might be a bit clogged
  - There is dirt or other gunk on your throttle valve assembly,
possibly internally.  Take it out of the van and clean it
  - your idle switch on the throttle assembly is not set properly or
it is malfunctioning (it's engaged at idle, right?   You can check it
visually and you'll hear a small click..)

On Tue, 14 Dec 2004 10:38:02 -0600, David J. Bohannan
<david.bohannan@verizon.net> wrote:
> All,
>
> Unable to search archives since Friday night, it comes up with just a
> blank page.not sure what's up with that.
>
> My problem has to do with something that maintains the idle on my
> 1.9.its only when I let off the gas after having the motor revving.could
> be from driving round town, or coming off the highway.it just has a hard
> time getting right back to the 750-800 rpm it normally idles at.
>
> The Bentley doesn't seem to be too helpful with this in there seem to be
> different instructions on the 85, but certainly don't make much sense.
>
> I solved this problem in the past by cranking that huge screw on the
> throttle body, but in colder weather this made the idle around 1500 rpm,
> ouch!
>
> Help!
>
> My second problem is the starting when hot.cranks right over when cold,
> but when I have it warmed up it doesn't want to turn over hardly at
> all!!! I KNOW there are exhaustive emails in the archive on both
> subjects, so if someone could hook me up I would appreciate it!!!
>
> Dave
>
> 85 GL 1.9
>