[Gmecm] Re: Closed loop and stalling

[Frank McCracken]

Rick;
Your suggestion to put it into diagnostic mode, is to jump A and B? And then
continue with procedure?
What do you set tps voltage at? I have conflcting voltage settings.
747 ecm, 400sb, Holley tbi, manual shift.
Frank.



----- Original Message -----
From: "Rick McLeod" <dunvegan at sbcglobal.net>
To: <gmecm at diy-efi.org>
Sent: Wednesday, May 25, 2005 9:57 AM
Subject: Re: [Gmecm] Re: Closed loop and stalling


> Most have a code that when in diag mode, they extend
> the pintle, so I place in that mode, wait, then remove
> connector, and then remove diag mode, start car,
> adjust idle to just below spec, restart after
> reconnecting IAC, and all is good. Works great on my
> TPI cars, and I also set TPS at the same time to make
> sure all is good, always get good off-idle resonse w/
> this procedure.
>
>
> --- Cowen <captain_krill at yahoo.com> wrote:
> > Oops.  When I described setting the idle stop screw
> > for proper idle, I forgot one step - actually I
> > still
> > forget it!  If I recall, before you begin, I believe
> > you have to pull the ECM fuse.  If you don't pull
> > the
> > fuse, when you switch the ignition ON, the IAC will
> > extend the pintle (as you want) but then pull it
> > back
> > again to the "start" position.
> > Pulling the ECM fuse forces the IAC to extend the
> > pintle fully, allowing you to set the idle with the
> > throttle plate only.  The IAC will have minimal
> > adjusting to do after that.  Be sure to replace the
> > fuse before starting the engine.  Sorry about the
> > omission!
> >
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