Re: Brass Idle Speed Screws

["David Teitelbaum" <jtrealty@xxxx>]

When you disable the idle speed motor you give up a lot. The motor
will no longer run faster when cold and if you turn on the A/C or run
a lot of accessories like headlights and rear defogger the ISM cannot
keep the idle speed stable. Under high loads at idle the ISM will keep
the idle at 775 rpm. The fixed metering screws cannot adjust to
varying loads. In addition in some states you are not supposed to
tamper with anything that can affect the emissions. Some states do
check these things. For your own sake and that of a future owner it is
usually best to keep the car as origional as you can. It is often
harder to make changes than to try to stay origional.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx> wrote:
> 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