[Diy_efi] RE: Swaping 1225550 crossfire with 1227747 (correction)

[Lee M. Lemoine]

Check your IAC pintle wiring.  I had a similar problem with my Haltech once
i installed it, got a few pins of the IAC servo wrong.  It'd be quick to
open but extremely slow to close, and the servo got extremely hot.  Double
check the pins, if its the same type of servo that 90% of GM cars has, its a
two element servo motor (A/B) and each should have a low/hi pin.  Make sure
they're hooked up to the right place on the ECM.  If your sure of this, try
reversing the pins on the ECM for "A" and "B" but keep the polarity the
same.  if that doesn't work...  go back to the A/B and reverse the
polarity.  i did a lot of mixing and matching before I got mine to work...

--Lee

On 4/3/06, Greg Parmer <parmega at auburn.edu> wrote:
>
> Is the VSS hooked up? Did you take a road trip? IAC resets itself at a
> certain
> speed (35mph?) so it can find "zero". There is also a way to reset it via
> the
> ALDL (which is at least a stop gap fix) I think, but the preferred method
> is to
> use VSS so other ECM functions can also work.
>
> If you've already done that...I dunno. I'd verify with a scanner that the
> VSS is
> doing what you think it's doing.
>
> -greg
>
>
> > -----Original Message-----
> > did you reconfiqure the IAC steps?  CF used two IAC's while the 7747
> > assumes only one.  not sure if that is the issue but it is worthy of
> > taking a look at.
> >
> > -----Original Message-----
> >
> > Just wanted to let the forum know I finished the ECM swap out and it
> > worked
> > great, started right up and ran fine.
> >
> > Thanks for all the help various folks gave me along the way.
> >
> > Only one question remains; initially when the engine first started up
> > the
> > idle was high about 1800 rpm and as the engine warmed up the idle
> > stepped
> > down to about 700, which was great. Now the idle stays high at about
> > 1800
> > rpm even after the car is driven around. .
> >
> > Any suggestions as to what could be going on here.
> >
> > Thanks,
> > Chuck
> >
> >
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--
Sincerely,

Lee M. Lemoine
http://www.turbochargedsoul.com/
'06 Subaru Legacy GT Limited - 250/250 AWD 5EAT
'93 Chevy Cavalier Z24 Convertible - 300/330 FWD 5MT (Mclaren Turbo!)