'165 Minimum Air Question...

[Bob Wooten]

what would you use as a minimum setting (using counts)?  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).

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
> >
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--- Bob Wooten
--- r71chevy at earthlink.net
--- www.r71camaro.homestead.com



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