Idle too high. How do I adjust

[ZZZ Temp-Gold]

As far as connecting a VSS, Couldn't I just connect it or would I have to
mechanically power it as well? 

I dont see the connection logically between the VSS and idle, as it idles
perfectly, other than too high for the boat. In the vehicle, 800 would be
very suitable. 

Is the alternative a reprogrammed chip? If so Does anyone offer such a
service? Id like a stock chip with an altered idle setting. 

Thanks,

Greg

> ----------
> From: 	rr[SMTP:RRauscher at nni.com]
> Reply To: 	gmecm at diy-efi.org
> Sent: 	Monday, September 10, 2001 3:35 PM
> To: 	gmecm at diy-efi.org
> Subject: 	Re: Idle too high. How do I adjust
> 
> 
> I would be tempted to add a switch to the throttle that activated
> a 555 at ~50Hz to simulate a VSS. Just have it off at idle setting
> and on shortly above that. Should be enough to get the IAC to
> cooperate.
> 
> BobR.
> 
> 
> ZZZ Temp-Gold wrote:
> 
> > 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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