Idle too high. How do I adjust

[ZZZ Temp-Gold]

I disabled the IAC. Yes it does idle @ 500, but now has trouble starting. It
doesn't seem to make a difference where I set the idle, the starting problem
remains w/o the IAC. Is it conceivable to use some type of relay to toggle
on IAC when starting?  (With the IAC, it starts immediately, and idles up
for a couple seconds then back down again. This is where, I think it would
be nice to disable it.) Any ideas?

The schematic at http://www.diy-efi.org/gmecm/ecm_info/1227747/747ecm1.jpg.
indicates that high gear sensor is on pin C7. My ecu has no wire there.
Also, the schematic indicates that park neutral sensor is active on ground.
Unless, Im not interpreting it correctly. 

g

> ----------
> From: 	Gregory A. Parmer[SMTP:gparmer at acesag.auburn.edu]
> Reply To: 	gmecm at diy-efi.org
> Sent: 	Wednesday, September 05, 2001 10:04 PM
> To: 	'gmecm at diy-efi.org'
> Subject: 	RE: Idle too high. How do I adjust
> 
> 
> > so, I do not have it connected to anything. Are you thinking this
> effects
> > upper rpm or idle? I dont have the gear selector connected either. Isnt
> this
> > a neutral/park indicator? Could the VSS limit the rpm to 4200?
> 
> No VSS=Idle trouble, mostly. Wouldn't think VSS would limit RPM, but I
> would try switching the neutral/park pin briefly to see if that had an
> effect. If you set it to "Drive" and there's no VSS it'll set a code
> eventually, but it'd be a worthwhile test on the 4200 RPM question.
> 
> Disabling IAC completely isn't such a bad option probably, for a
> boat...tho a RNDL switch helping to control idle would make a nice touch.
> 
> -greg
> 
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