DIY_EFI Digest Saturday, July 17 1999 Volume 04 : Number 418 In this issue: Re: HELP, I erased the flash in my PCM Re: DIY_EFI Digest V4 #417 Pretty Good Protection Re: EEC-IV PROBLEM WITH ACCELERATION See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Fri, 16 Jul 1999 15:13:43 -0500 From: Donald Whisnant Subject: Re: HELP, I erased the flash in my PCM > >Date: Wed, 7 Jul 1999 18:04:56 -0500 >From: "Jennifer and Brock Fraser" >Subject: Re: HELP, I erased the flash in my PCM > >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 > Brock... How's it going? ... We still call them "wheel chocks" here! :) :) Their newer '98 and '99 computers aren't any better!! Donald ------------------------------ Date: Fri, 16 Jul 1999 16:32:43 -0400 From: Barry Tisdale Subject: Re: DIY_EFI Digest V4 #417 At 03:00 PM 7/16/99 -0400, you wrote: > >DIY_EFI Digest Friday, July 16 1999 Volume 04 : Number 417 > > > >In this issue: > > DIY_EFI Digest V4 #402 > Wiring Diagrams > >See the end of the digest for information on subscribing to the >DIY_EFI or DIY_EFI-Digest mailing lists. > >---------------------------------------------------------------------- > >Date: Thu, 8 Jul 1999 05:00:01 -0400 >From: DIY_EFI-Digest-Owner@xxx.edu (DIY_EFI Digest) >Subject: DIY_EFI Digest V4 #402 > >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 > >See the end of the digest for information on subscribing to the >DIY_EFI or DIY_EFI-Digest mailing lists. > >- ---------------------------------------------------------------------- > >Date: Wed, 7 Jul 1999 15:09:33 EDT >From: Mikepoore@xxx.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 > >- ------------------------------ > >Date: Wed, 7 Jul 1999 15:18:54 -0400 >From: "C. Brooks" >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 > >- ------------------------------ > >Date: Wed, 7 Jul 1999 15:58:58 EDT >From: EFISYSTEMS@xxx.com >Subject: Hummer Parts (sorry, off subject) > >- - --part1_272d25ee.24b50b82_boundary >Content-Type: text/plain; charset="us-ascii" >Content-Transfer-Encoding: 7bit > >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@xxx.edu > CC: gmecm@xxx.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 >> > > >- - --part1_272d25ee.24b50b82_boundary >Content-Type: message/rfc822 >Content-Disposition: inline > >Return-path: EFISYSTEMS@xxx.com >From: EFISYSTEMS@xxx.com >Full-name: EFISYSTEMS >Message-ID: <272d25ee.24b50add@xxx.com> >Date: Wed, 7 Jul 1999 15:56:13 EDT >Subject: Hummer Parts (sorry, off subject) >To: diy_efi@xxx.edu >CC: gmecm@xxx.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" >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" >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 > >- ------------------------------ > >End of DIY_EFI Digest V4 #402 >***************************** > >To subscribe to DIY_EFI-Digest, send the command: > > subscribe diy_efi-digest > >in the body of a message to "Majordomo@xxx. > >A non-digest (direct mail) version of this list is also available; to >subscribe to that instead, replace "diy_efi-digest" in the command > above with "diy_efi". > >------------------------------ > >Date: Sat, 17 Jul 1999 10:49:38 -0600 >From: cwagner@xxx.net >Subject: Wiring Diagrams > >Does anyone have any wiring diagrams for the Bosch KE-Jetronic >CIS systems? > >------------------------------ > >End of DIY_EFI Digest V4 #417 >***************************** > >To subscribe to DIY_EFI-Digest, send the command: > > subscribe diy_efi-digest > >in the body of a message to "Majordomo@xxx. > >A non-digest (direct mail) version of this list is also available; to >subscribe to that instead, replace "diy_efi-digest" in the command > above with "diy_efi". > > ------------------------------ Date: Fri, 16 Jul 1999 20:35:28 -0400 From: Shannen Durphey Subject: Pretty Good Protection Hi, all. I was attempting to copy a calibration last week, and was having problems with the files coming up with zeros in all locations. After several attempts, and much double and triplechecking various items, I decided it was the memcal. Some investigation, and handy work with a pick and razor blade revealed that the programmer had clipped pin 28 of the 27256 chip. A small pin completed the open circuit, but now I couldn't get a read that would verify. More investigation revealed another clipped pin, I believe # 14. There's a pinout here: http://www.twinight.org/chipdir/giicm/27256.txt which shows the pins as VCC and GND. What is VCC Am I remembering incorrectly about the GND pin being clipped? (they were cross corner, top right and lower left of chip) Is there a brief way to explain why this worked, and how the chip was still able to work in the ecm? Shannen ------------------------------ Date: Thu, 10 Jun 1999 01:04:35 -0300 From: "Paulo Mateiro" Subject: Re: EEC-IV PROBLEM WITH ACCELERATION Hello Ken; You is correct, our alcohol is 97% alcohol and 2% methanol , 1% water or 97% alcohol, 3% gasoline, and in some places 100% alcohol. Today most cars runs with gas. more than 65%... My eec-iv unit is to gas, my stock engine is gasoline.... My engine have 120hp gas, the same model have 155hp with alcohol.. But, the same parts of model gas is the same to alcohol... except the calibration ,sure. : ) So Ken, i checked: Coil Spark Plugs Sensor Lambanda TFI (i replace) MAP (i replace) TPS TEMPERATURE SENSOR (i replace) HALL SENSOR Wires, voltage, connection of wires to ground... so , all correct, but when i connect to diagnose after ENGINE ID, engine down, or when it step pass i receive the CODE 18... when not in diagnose mode, in normal mode... engine run ok for 30 or 60 seconds, after it, when i accel... rpm "up with faliure" (sorry, my english is bad) Thanks ... Paulo ------------------------------ End of DIY_EFI Digest V4 #418 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".