DIY_EFI Digest V4 #402

[DIY_EFI Digest]

DIY_EFI Digest         Thursday, July 8 1999         Volume 04 : Number 402



In this issue:

	1226870 ecm questions
	Thunder Bay EFI
	Hummer Parts (sorry, off subject)
	EFI system comparison
	Re: HELP, I erased the flash in my PCM

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Date: Wed, 7 Jul 1999 15:09:33 EDT
From: Mikepoore at aol.com
Subject: 1226870 ecm questions

I am trying to link my laptop to the ecm datastream. I have learned that it 
is 160bps and that a 10k resistor between the A and B terminals will put the 
ecm into diagnostics mode.

I would like to write a program that I would share with everyone to analyze 
oem systems in the field.

If anyone can answer the following questions, I would greatly appreciate it:

1. What are the communications parameters, i.e. data bits, stop bits, parity, 
etc.

2. Does anyone know how to decode the data into useful information?

3. 160 bps is not a com port option on the menu. Can I just type it in and it 
work?

4. Is there a handshake that must occur when initializing communication, or 
do I just plug it in and start receiving?

5. I've seen Diacom advertised, but has anyone on the list has written 
anything that might be similar?

Mike

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Date: Wed, 7 Jul 1999 15:18:54 -0400
From: "C. Brooks" <cbrooks1 at tqci.net>
Subject: Thunder Bay EFI

Has anyone ever heard of a company called "Thunder Bay"? Supposedly they
deal in EFI hardware. I was given the name in passing by someone I met.

Charles Brooks

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Date: Wed, 7 Jul 1999 15:58:58 EDT
From: EFISYSTEMS at aol.com
Subject: Hummer Parts (sorry, off subject)

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In a message dated 7/7/99 12:56:13 PM Pacific Daylight Time, EFISYSTEMS 
writes:

<< Subj:	Hummer Parts (sorry, off subject)
 Date:	7/7/99 12:56:13 PM Pacific Daylight Time
 From:	EFISYSTEMS
 To:	diy_efi at 332.eng.ohio-state.edu
 CC:	gmecm at efi332.eng.ohio-state.edu
 
 Hi People,
        I am trying to find a cross reference for part numbers that I 
have.....these are for army issue 89-90 hummers with the 6.2 diesel 
engine......I noticed some of the people on this list have hummers and would 
appreciate any response I get.....all the part numbers I have are from 
Mexico...ex  5740046......5740072....and approx 100 more...all descriptions I 
have are in spanish and aren't of much use.....anyone????
 Thanks again,
 -Carl Summers >>


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Return-path: EFISYSTEMS at aol.com
From: EFISYSTEMS at aol.com
Full-name: EFISYSTEMS
Message-ID: <272d25ee.24b50add at aol.com>
Date: Wed, 7 Jul 1999 15:56:13 EDT
Subject: Hummer Parts (sorry, off subject)
To: diy_efi at 332.eng.ohio-state.edu
CC: gmecm at efi332.eng.ohio-state.edu
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-Mailer: AOL 4.0 for Windows 95 sub 13

Hi People,
       I am trying to find a cross reference for part numbers that I 
have.....these are for army issue 89-90 hummers with the 6.2 diesel 
engine......I noticed some of the people on this list have hummers and would 
appreciate any response I get.....all the part numbers I have are from 
Mexico...ex  5740046......5740072....and approx 100 more...all descriptions I 
have are in spanish and aren't of much use.....anyone????
Thanks again,
- -Carl Summers

- --part1_272d25ee.24b50b82_boundary--

------------------------------

Date: Wed, 7 Jul 1999 16:38:42 -0400
From: "C. Brooks" <cbrooks1 at tqci.net>
Subject: EFI system comparison

OK, I just uploaded the comparison to the incoming directory. The file name
is EFICOMP.rtf

Sorry it took so long.

Charles Brooks

------------------------------

Date: Wed, 7 Jul 1999 18:04:56 -0500
From: "Jennifer and Brock Fraser" <fraser at forbin.com>
Subject: Re: HELP, I erased the flash in my PCM

> Dave Hempstead wrote:
>
> > What do you experts do when they try to reflash a PCM, and you get a =
> > glitch, power failure, or some other error code.  I doubt that you throw
=
> > it away.  How do you recover the PCM???
>
> I'm not sure who you're thinking of when you say expert, but at the
> dealership level we would have to order a replacement pcm.  GM loves
> to warn against letting the pcm voltage drop while programming one.
> For a tech, you're part would be declared DOA.
> Shannen

You see how the computer kinda has a wedge shape to it?  Well, we used to
call PCM's such as yours "wheel chocks" or "door stops".  Don't mean to make
fun of your unfortunate situation, but what can I say...  better get out
your [de]soldering station.  BTW-  This problem cost a company I used to
work for a LOT of money until some problems were resolved... if that makes
you feel any better.

- -Brock

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End of DIY_EFI Digest V4 #402
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