I suppose that could be true about a 1.9.
it sure seems to me though ..
if it's designed and built to have idle switch contact at zero throttle..
that's how we should repair and adjust them.

it would be nice to see if injector signal is cut off at zero throttle above
whatever the rpm is for that ..
would be interesting to see ,
then see if no idle switch contact keeps that feature from working.
I suppose I'd rig a 5th injector wire connector, and put a noid light in it,
and put it where I could watch it in the rear view mirror.
somebody want to try that ?
is there anything wrong with connecting in parallel with one injector plug
and running a noid light off it ?
doesn't seem quite right ..but the ecu might not mind ..
though would that injector fire normally  then ?
or name some other *direct* easy way to see when the injectors are not fired
during decel ..
and do it while driving.
Scott

----- Original Message -----
From: "David Beierl" <dbeierl@ATTGLOBAL.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, January 24, 2011 3:32 PM
Subject: Re: 85 Vangon revs drops, revs drops, revs drops, and then dies
after a few minutes of this cycle

> At 05:52 PM 1/24/2011, Scott Daniel  - Turbovans wrote:
>>if the throttle switch stays closed with too much open throttle ..
>>say you want it closed at zero throttle but breaks contact at 5 % throttle
>>..
>>if it goes to say 10 % throttle before not making contact..
>>you get bucking at very low throttle openings.
>
> That's what I meant by "fails to open"
>
>>You want it to make contact as close to zero throttle as you can
>>..AND ...every last time the throttle closes ....it must make contact.
>
> On the 1.9l, where the ECU deals strictly with fuel and the idle stab
> is taken care of by advancing the timing, I'll bet a nickel that
> there's no way to tell without instruments whether that switch closes
> at closed throttle or not, and that the only deleterious effect if it
> doesn't is slightly lowered mileage (because the decel fuel cutoff
> isn't operating).  Totally different on the 2.1l, of course.
>
> Yours,
> David