Scott, David:

Thanks, guys. I do have a tach on the dash and it reads well below 1,000
rpm, but it's a cheap VDO. I'll hook up another this weekend (weather's
a bit grotty right now) and see what it says.

I want to emphasize that the hunting first appeared a couple years ago,
that the hunting is sporadic but occurring more frequently now, and it
occurs whether or not the idle stab thingy is connected or bypassed.

Anyone got a loaner idle stab for the 1.9L that I can borry for a couple
weeks?

I will check the throttle switches. Last time I checked was five years
ago when I was sorting out some other problem, had the "no throttle"
switch wired to an LED up on the dash and the switch was working
perfectly then. I can wait until the idle starts hunting again and pop
the engine compartment lid and see if the switch is closed.

On Wed, 2011-03-16 at 22:36 -0400, David Beierl wrote:

> At 10:26 PM 3/16/2011, Scott Daniel - Turbovans wrote:
> >that the throttle switch makes contact at idle is a very important input ..
> >It's almost rare that I find them working correctly on these 25 year old
>
> However - if the switch *is* working and the idle is high, the
> deceleration fuel shutoff kicks in much earlier than it does on the
> 2.1l, not that much above 1000 rpm.  On an '84 with no tach I think
> you could easily have an idle high enough to trigger it without it
> sounding too unusual.  And if you're nibbling at the edge of the
> decel mode, that will make the idle hunt for sure.
>
> Yrs,
> d