'165 manual trans idle behavior.

[Programmer]

I don't know if this helps or not--there's also some stuff on the
decel fuel cut off...

Lyndon.


*******************************************************
* >>> IAC Tables & Params <<<
*
*******************************************************
LC62E: FCB 128 ; RPM 12.5 Msec Filter Coef, (0.5)
; CALIB = Arg * 256
LC62F: FCB 144 ; Idle Spd Start up park posit.
; CALIB = Arg
LC630: FCB 32 ; Steps Added to Warm Park posit if
; hot restart spark retard is active.
LC631: FCB 10 ; Steps Added to Warm Park down if
; A/C on during start up.
LC632: FCB 5 ; Add Steps for Fan Anticipate
; CALIB = Arg/2
LC633: FCB 5 ;Add Offset for Cold Engine
;when cold spark has expired
;
; Cmd Speed Definitions
;
LC634: FCB 4 ; IAC offset added for pk/neut
; CALIB = Arg/12.5, (50 RPM)
LC635: FCB 160 ; Idle Speed Strt up Dly Time
; CALIB = Arg/6.25, (1000 Sec)
LC636: FCB 0 ; IAC Offset Cmd Spd Added
; CALIB = Num/12.5, (RPM)


----- Original Message -----
From: romans, mark <romans at starstream.net>
To: <gmecm at diy-efi.org>
Sent: Tuesday, June 19, 2001 9:09 AM
Subject: Re: '165 manual trans idle behavior.


> Two issues.
>
> 1) Stalling, the setting that is there helps prevent stalling.
> (I fought a stalling issue since I built my engine, it is now pretty much
> resolved).
> 2) Where is the idle byte?  I have looked at the listing and don't
> remember seeing it.  I suspect it's not in the lookup tables?
>
> Mark
>
> ----- Original Message -----
> From: "Programmer" <nwester at eidnet.org>
> To: <gmecm at diy-efi.org>
> Sent: Monday, June 18, 2001 10:24 PM
> Subject: Re: '165 manual trans idle behavior.
>
>
> > Maybe one could change the "idle" byte to "5 mph" instead of  0 ??
> >
> > Lyndon.
> > ----- Original Message -----
> > From: Kevin Crain <warpten at warpten.com>
> > To: <gmecm at diy-efi.org>
> > Sent: Monday, June 18, 2001 12:03 PM
> > Subject: Re: '165 manual trans idle behavior.
> >
> >
> > > I'm noticing with my APYP code and 750 idle at coolant temp above
> 100degF
> > > that it holds at ~1250rpm when coming to a halt, then goes to 750rpm
> after
> > > a few sec of 0mph VSS input.  Kinda annoying, I'd like to see it go
> > > straight to 750 immediately on halt, but just a slight nuisance.
> > >
> > > -Kevin
> > >
> > > On Sun, 17 Jun 2001, Programmer wrote:
> > >
> > > > Yeah--read back through the schematics...no clutch switch
> input--sorry.
> > > > There is--however--an idle learn strategy. Like Mark mentioned, I
> think
> > > > part of the strategy is "0" VSS for idle. If there's any EMI down
the
> > line
> > > > that feeds the computer a synthetic vss signal, it won't idle low.
> > > >
> > > > Lyndon
> > > >
> > > > ----- Original Message -----
> > > > From: Kevin Crain <kevin at warpten.com>
> > > > To: <gmecm at diy-efi.org>
> > > > Sent: Saturday, June 16, 2001 7:08 PM
> > > > Subject: '165 manual trans idle behavior.
> > > >
> > > >
> > > > > The symptoms you describe are exactly what I see with the ARAP
code,
> > even
> > > > > with the manual trans bit set to 1.  Haven't had time to get an
ALDL
> > scan
> > > > > with the APYP ('89 Vette, 6-speed manual) code but the idle seemed
> to
> > > > > follow the pedal more closely when coming to a stop.  I'll report
> back
> > on
> > > > > Monday...got a race to attend at Pocono on Sun.
> > > > >
> > > > > The '88 Firebird Helms manual shows no clutch switch input to the
> ECM,
> > > > > period.  It has an input from the gear selector that closes to
> ground
> > > > > whenever the shifter is in either P or N.  Given that this wire is
> now
> > > > open
> > > > > (heat shrink over the end, bundled neatly aside) my ECM never sees
> me
> > in P
> > > > > or N, and ALDL data confirms this.
> > > > >
> > > > > The only wiring to the clutch switch is the starter interlock, and
> > it's
> > > > > just the clutch "pedal in" switch in series with the starter
> solenoid
> > > > > circuit.  Until that switch closes, you have no voltage to the
> starter
> > sol
> > > > > with the key in <START> position.
> > > > >
> > > > > -Kevin
> > > > >
> > > > > At 05:14 PM 6/16/01 -0700, you wrote:
> > > > > >So, what pin was it?  What code are you running?
> > > > > >I have a friend who runs 89 auto code in his 88 Firebird
> > > > > >that he put a 6 speed in.  350 tpi. His idle hangs until
> > > > > >he comes to a stop and waits.
> > > > > >Any ideas?
> > > > > >Thanks.
> > > > > >Mark
> > > > > >----- Original Message -----
> > > > > >From: "Kevin Crain" <kevin at warpten.com>
> > > > > >To: <gmecm at diy-efi.org>
> > > > > >Sent: Saturday, June 16, 2001 9:24 AM
> > > > > >Subject: Re: Fwd: Back from brazil and pistons
> > > > > >
> > > > > >
> > > > > >> At 08:50 AM 6/16/01 -0600, you wrote:
> > > > > >> >Are you giving the PCM a clutch switch signal ?
> > > > > >> >It may stall on you with the vette 6 speed bin...
> > > > > >> >
> > > > > >>
> > > > > >> Hmmm.  No, I'm not sending a clutch switch signal.  There are
two
> > > > switches
> > > > > >> on the '95 Firebird pedal set...one that closes when the clutch
> > pedal
> > > > is
> > > > > >> out and another that closes when the pedal's in.  Guess it's
time
> > to
> > > > haul
> > > > > >> out the Helms and see which pin(s) the '165 ECM wants to see
> which
> > > > signal
> > > > > >on.
> > > > > >>
> > > > > >> No stalling issue, no SES light, and the idle returns to 750
much
> > more
> > > > > >> quickly now when stopping.
> > > > > >>
> > > > > >> -Kevin
> > > > > >>
> > > > > >> -Kevin
> > > > >
> > > >
> >
>
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> > > >
> >
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