'165 Minimum Air Question...

[Shannen Durphey]

Bob Wooten wrote:
> 
> what would you use as a minimum setting (using counts)? 
Kinda depends, but I like to see 45-60 or so on the scantool.  T

> by poor idle
> control you mean that it might surge & pretend that it wants to die when it
> is just sitting there idling or when coming to a firm stop (firm stop is
> kind of like spirited driving only acceleration in the other direction).
Anything like spirited not driving?
Poor idle control is stalling as soon as it's put into gear, and/or stalling at
stops, and/or low idle speeds, and/or no A/C compensation, and/or sometimes no idle
speed flare on startup
> 
> TIA
> BW
> 
> > [Original Message]
> > From: Shannen Durphey <Shannen at grolen.com>
> > To: <gmecm at diy-efi.org>
> > Date: 2/13/01 9:19:07 PM
> > Subject: Re: '165 Minimum Air Question...
> >
> > Like Dan suggested, you need to ensure that the IAC is fully closed and
> not under
> > ecm control when setting minimum air.  Minumum air settings are a bit of a
> > balancing act, IMO.  I like to use IAC counts as a reference for correct
> throttle
> > position.  IAC counts will depend on minimum air, timing, tps adjustment,
> and fuel
> > delivery values.  The farther you are from stock, the more these factors
> change
> > from stock settings, and the more room you'll have to make mistakes.
> However...
> > Do not close the throttle plates completely.  You can often run the
> engine 'till
> > warm, back off the throttle stop screw completely, turn the screw back up
> until the
> > throttle lever arm just makes contact with the screw, then go an
> additional 1/2 to
> > 1 turn.  Again, I like to check the IAC counts as a reference.  Once the
> throttle
> > stop is set, leave it alone.  There may be occasions where you need to
> adjust it,
> > but think of it as the last item on the list to change.
> >
> > One question:  Did the car work with this minimum air setting at all?
> TPI engines
> > seem to "use up" IAC motors more often than other systems.  One of the
> signs of a
> > faulty IAC is poor idle control when the engine is warm.
> >
> > Shannen
> > OneSS2NV at aol.com wrote:
> > >
> > > Hello all,
> > >    I was curious if anyone can give some tips on setting the Minimum
> Air for
> > > an '87 '165 F-body?  The spec given is 450 rpms, but it seems too low.
> I
> > > have it set there, and when I shift from Park or Drive into Reverse,
> the RPMs
> > > drop too low and the car stalls.
> > >    The motor is a 305 with a mild Crane 2031 roller cam and World
> Products
> > > Heads (basically stock, with 1.94/1.50 valves), so should I assume that
> it
> > > needs a bit more RPM to keep the computer happy?  Is this a case of
> "give the
> > > car what it wants, not what the book says?"
> > >
> > >       Thanks in advance,
> > >          Steve Ragusa
> > >           North Jersey
> > > '85 Monte SS with '87 F-body TPI
> > >         '96 Impala SS
> > >    www.bowtiepower.com
> > >
> ----------------------------------------------------------------------------
> > > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> > > in the body of a message (not the subject) to
> majordomo at lists.diy-efi.org
> >
> ----------------------------------------------------------------------------
> > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> > in the body of a message (not the subject) to majordomo at lists.diy-efi.org
> >
> 
> --- Bob Wooten
> --- r71chevy at earthlink.net
> --- www.r71camaro.homestead.com
> 
> ----------------------------------------------------------------------------
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org