16242921 LT1 PCM

[Daniel]

Thanks Eric that solves the problem I can now give up trying to play with it
with Tunercat - LT1 stuff is pretty well unknown here downunder.

Daniel

----- Original Message -----
From: "Eric Bryant" <BRYANTE at ghsp.com>
To: <gmecm at diy-efi.org>
Sent: Wednesday, August 01, 2001 8:52 PM
Subject: RE: 16242921 LT1 PCM


> > From: Daniel [mailto:bossute at iprimus.com.au]
> > Subject: Re: 16242921 LT1 PCM
> >
> >
> > Does anyone know what this PCM came out of
> >
> >  SERV.NO 16242921 CCCA
> >  *86CCCA90704CRA* 16257721
> >  HDW NO 16239920
> >
> > A friend has it fitted to his landcruiser ( 350 LT1) and we
> > thought it may
> > be the same as a 8051 (looks identical and my 8051 will plug
> > in and run in
> > its place ) .After several attempts to read the flash we were
> > unsuccessful
>
> Looks to be a '97 F-body PCM, which means it has the GM 1850 PWM
interface,
> not the typical ALDL hardware setup.  As far as I know, the only
programming
> software available for these OBDII PCMs is the Carputing (LT1_edit) stuff.
>
> Your 8051 will run the system just fine because it's pretty much pin-out
> compatible (I replaced the 16214399 PCM in my Impala with the '8051 with
the
> help from some guys on the LT1_edit list).  The modifications required
> differ by application, but in my case (B-body application) I needed to tie
> the two knock sensor input pins together (Blue 21 and 22) and then place a
> 2k resistor between those pins and ground.  This was to avoid replacing
the
> '96 and up knock sensors, which have a larger output impedence (100k, as
> opposed to 3.9k for early knock sensors).  If you don't place the
resistor,
> the PCM won't see the correct impedence across the knock-sensor pins and
> it'll throw a DTC42.
>
> You may only be running one knock sensor, in which case you just need to
> make sure it's on pin Blue 22.  If it's already an earlier-style 3.9k
> sensor, than the resistor shouldn't be needed.
>
> Eric Bryant
> mailto:bryante at ghsp.com
> http://www.bryantperformance.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