Low Idle w/ Saturn tuned port EFI.

[Jemison Richard]

Thanks a bunch Dave.  I'll check my manual and give it another try.

> -----Original Message-----
> From:	David A. Cooley [SMTP:n5xmt at bellsouth.net]
> Sent:	Monday, October 26, 1998 7:32 AM
> To:	diy_efi at efi332.eng.ohio-state.edu
> Subject:	Re: Low Idle w/ Saturn tuned port EFI.
> 
> At 07:11 AM 10/26/98 -0500, you wrote:
> 
> >off completely.  Nothing.  Then I disconnected the IAC with the idle
> screw
> >completely backed off (and this is what's got me thinking).  This thing
> >idles at about 2500 with no IAC and no idle screw setting!  The IAC is
> >actually REDUCING the RPM.  Geez, I can feel you guys out there on the
> floor
> >rolling in uncontrolled laughter.  Go for it!  Just give me the answer!
> 
> Rick,
> There is usually a base idle procedure for setting idle with the screw...
> On my 85 buick GN, you had to short pins A&B of the diagnostic connector,
> turn the key on for 30 seconds and while the key was still on, disconnect
> the IAC.  Then turn the key off, unshort the diag connector pins and start
> the car.  This made the IAC motor retract fully.  I'm sure Saturn has a
> procedure in their service manual.  Probably called base idle air adjust
> or
> something similar.
> Since it seems to idle up when you disconnect the IAC, the IAC and drivers
> seem ok. 
> The trouble code probably came from the iac making small adjustments and
> the ecm seeing no change.
> IAC passages plug up with carbon and crud over time from PCV and EGR.
> Best
> bet is to remove the IAC and clean the throttle body and all the passages
> in it with carb cleaner then give it another whirl.
> 
> Later,
> Dave
> 
> ===========================================================
>            David Cooley N5XMT           Internet: N5XMT at bellsouth.net
>      Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
>        I am Pentium of Borg...division is futile...you will be
> approximated.
> ===========================================================