Low Idle w/ Saturn tuned port EFI.

[Shannen Durphey]

I don't know what year/model/engine you have, but I noticed that there
is a TSB whose title fits your symptoms.  Try here:
http://www.alldata.com/pro/TSB/
If you find a title you want, you might try looking through the same
site for a garage in your area which has Alldata, they can look up the
service bulletin.

And definitely do as David suggests, check the IAC passages and
throttle body for carbon buildup.

I've used a tech 1 on Saturn, and I'd guess that a snap-on scanner
would work.  Both spendy units.

Shannen

Jemison Richard wrote:
> 
> Shannon,
> 
> Thanks for the input and no I don't have access to a scan tool at this time
> (I have no idea which one would even connect up to a Saturn ECU).
> 
> The adjustment I speak of the initial adjustment on the plunger.  The
> instructions that came with the unit specifically stated that the plunger
> being extended > 1" (could have been 1.1 - whatever)  could damage the unit
> and stated to check this value and adjust as necessary.  I was right on the
> limit as it came out of the box and so did not adjust the unit at all.
> 
> I've always heard that the IAC "kicks" the idle up to compensate for varying
> conditions (temp, accessories, etc).  What I saw was with no IAC control the
> idle was about 2500.  With the IAC it dropped to like 500 rpm (and yes this
> is a problem as I cannot run my air or the car will die and the car barely
> runs at the current idle).  So, I reasoned that the IAC was actually (in a
> controlling manner) adjusting the idle as necessary from some initial high
> value (in this case 2500 rpm).  So, if the IAC is adjustable (and I don't
> know the limits to this adjustment) it might be possible to retract the
> plunger (and I'm assuming here) increasing the idle rpm.
> 
> Got a response (you can probably see it) from David Cooley in which he
> states there is a base idle procedure.  It may be that I simply haven't
> "set" the idle correctly.  So I'm gonna go back through my book and check
> this out.
> 
> Do you have any idea what kinds of scan tools would work with a Saturn?
> Thanks.
> 
> Rick
>