'165 manual trans idle behavior.

[Kevin Crain]

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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