Brass Idle Speed Screws

["content22207" <brobertson@xxxx>]

Mention this to list with trepidation because it usually ignites flame
war, but IMHO is important:

At same time JZD was messing around with idle speed motors, Volvo just
used brass screws already built into PRV to set idle. Low tech, yes,
but less subject to problems. I think every owner should know how to
use in case automatic idle system fails or needs diagnosis, if nothing
else. Simply advising "just snug down and never worry about them
again" deprives owners of a valuable feature ALREADY IN PLACE (no mods
necessary).

FWIW: is the ONLY idle system on #5939, and you saw first hand how
well it works.

Side note: you've got ignition "advanced" and "retarded" flipped:
advanced is early, retarded is late. Might confuse someone's advice if
they didn't listen carefully to full explanation.

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote:
> I appreciate the tip. 
> 
> Uh...my brass screws are all shut I believe. When I first got the car,
> I read in the manual that they were supposed to be shut, so I checked
> them. I had hardly put -any- force on them when I hit the stops and 2
> of 3 just snapped right off. I was told not to worry about them since
> they should be shut.
> 
> My idle speed regulator is brand-new. Like everything else....and it
> is humming. I'm definitely keen on trying new things so I'll do it. By
> the way, is there a specific direction it should be installed? I
> wouldn't think so, because when it's open it's open and closed is
> closed. Either way air is going to flow or not depending on the valve
> position but you never know...
> 
> So if it's only supposed to be in there one way let me know.
> 
> After reading that last dude's article where his idle reg was stuck
> shut, I'm all for trying it out. I have been holding down the gas
> pedal 1/4 of the way.
> 
> I even tried yet another trick Bill at DMCH told me. I disabled the
> ignition to see if the spark was so retarded (early) that it was
> impeding the upward stroke of the pistons. Alas, it was not to be. It
> had no effect.
> 
> Thanks guys, keep 'em coming. I'm not quitting yet.
> 
> --- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <webmaster@xxxx> wrote:
> > You can achieve the same thing by unscrewing the brass screws by
approx 
> > 2 turns each on the rear two and 4 on the front one. This allows
air to 
> > bypass the throttles.
> > 
> > Martin
> > 
> > therealdmcvegas wrote:
> > 
> > >A weak ignition coil will most definatly keep the motor from
> turning over. But 
> > >there is another thing that will keep the motor from firing up:
> Lack of air.
> > >
> > >Unlike a carbed motor, the idle is not controled by the fuel
> delivery system, but 
> > >by another computer. If nothing else, try bypassing the Idle Speed
> Motor, and 
> > >run a straight tube between the two connections. 
> > >