DIY_EFI Digest Friday, 16 February 1996 Volume 01 : Number 044 In this issue: Re: GM Model 700 Throttle Body Looking for low-cost ignition analysis 'scope Re: GM Model 700 Throttle Body [none] [none] Re: Virus Re: <911> Bosch Motronic Re: your mail "Good times" Re: MAP Questions... Re: Re: <911> Bosch Motronic Re: <911> Bosch Motronic Re: Re: Re: "Good times" Re: Multiprocessor system Re: Multiprocessor system Re: "Good times" Re: "Good Times" hoax Re: No Subject Re: Virus Re: <911> Bosch Motronic 286 Vindication Re[2]: "Good times" Re: Re[2]: "Good times" Re: Re: Re: and a good time was had by all Re: Looking for low-cost ignition analysis 'scope Re[2]: See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: orin@xxx. Harding) Date: Thu, 15 Feb 1996 08:26:24 -0500 Subject: Re: GM Model 700 Throttle Body >whats your inlet fuel pressure at wot ? also check your pressure >reg or try plugging the t body fuel return line to get more >pressure; you should have at least 25 lbs with the engine not >running return line connected a good new intank fuel pump will >generate close to 40 psi . > > Arthur, The pressure regulator on the GM 700 TB is not adjustable and is factory set at about 16 PSIG...Where did you come up with the 25 PSIG number??..If you are right, then maybe you've shown me where the problem is...Thanks.. Orin Harding - Greensboro, NC ('74 MGB-GT - '79 MGB Roadster with Electromotive TEC II) ------------------------------ From: Bohdan.L.Bodnar@xxx.com Date: Thu, 15 Feb 1996 08:19:34 -0600 Subject: Looking for low-cost ignition analysis 'scope Subject line states all! I recall Sears selling a low-cost analog 'scope some 8 years ago under the Craftsman label. If anyone knows where I can get one, please inform me. An alternative I've thought about is to use a regular "lab scope" with an inductive pickup. I have such a scope and inductive pickups ("ac amp adaptor") are readily available (e.g., through Allied Electronics, Digikey, etc.). The problem is *calibrating* the scope for the given ignition pulse. My primary concern is monitoring the firing line and spark line voltage. Any thoughts on this approach? Cordially, Bohdan Bodnar bohdan.l.bodnar@xxx.com ------------------------------ From: arthurok@xxx.com (ARTHUR OKUN ) Date: Thu, 15 Feb 1996 07:46:50 -0800 Subject: Re: GM Model 700 Throttle Body that the regulator OUTPUT pressure the chilton says 26-32 psi inlet pressure at idle youll have to make up a tap to check it theirs no test connection point ; its not that hard to dissasemble the regulator to chek it . what sort of fuel pump are you using? I actualy have a chilton with that tb in it including test and repair info. ------------------------------ From: jgn@xxx. Napoli) Date: Thu, 15 Feb 1996 11:09:32 -0500 Subject: [none] I received this message this morning from a responsible colleauge who stressed that it is not a joke and is to be taken seriously. This is the first I have heard of this problem. However, due to the potential I am forwarding this information for your review. >Beware ! >_______________________ > > > > > COMPUTER VIRUS > > There is a computer virus that is being sent across the Internet. If > you receive an e-mail message with the subject line "Good Times," DO > NOT read the message, DELETE it immediately. Please read the messages > below. > > Some miscreant is sending e-mail under the title "Good Times" > nationwide. If you get anything like this, DON'T DOWNLOAD THE FILE! > It has a virus that rewrites your hard drive, obliterating anything > on it. > > Please be careful and forward this mail to anyone you care about. > > ************************************************************* > > WARNING!!!!!!! INTERNET VIRUS > > The FCC released a warning last Wednesday concerning a matter of major > importance to any regular user of the Internet. Apparently a new > computer virus has been engineered by a user of AMERICA ON LINE that > is unparalleled in its destructive capability. Other more well-known > viruses such as "Stoned," "Airwolf" and "Michaelangelo" pale in > comparison to the prospects of this newest creation by a warped > mentality. What makes this virus so terrifying, said the FCC, is the > fact that no program needs to be exchanged for a new computer to be > infected. It can be spread through the existing e-mail systems of the > Internet. Once a computer is infected, one of several things can > happen. If the computer contains a hard drive, that will most likely > be destroyed. If the program is not stopped, the computer's processor > will be placed in an nth-complexity infinite binary loop - which can > severely damage the processor if left running that way too long. > Unfortunately, most novice computer users will not realize what is > happening until it is far too late. Luckily, there is one sure means > of detecting what is now known as the "Good Times" virus. It always > travels to new computers the same way in a text e-mail message with > the subject line reading "Good Times." Avoiding infection is easy > once the file has been received - do not read it! The act of loading > the file into the mail server's ASCII buffer causes the "Good Times" > mainline program to initialize and execute. > > The program is highly intelligent - it will send copies of itself to > everyone whose e-mail address is contained in a receive-mail file or a > sent-mail file, if it can find one. It will then proceed to trash the > computer it is running on. The bottom line here is - if you receive a > file with the subject line "Good Times," delete it immediately! Do > not read it! Rest assured that the name was on the "From" line was > surely struck by the virus. Warn your friends and local system users > of this newest threat to the Internet! It could save them a lot of > time and money. > > E N D O F N O T E > > Regards, John ------------------------------ From: Jeff Hansen Date: Thu, 15 Feb 1996 09:26:40 Subject: [none] Jim, At Wed, 14 Feb 1996 22:30:19 -0700 you wrote > How about, that I have the SOURCE code to the 911 :) You have source code? How did you get it? Never mind, I don't wanna know ;) Can I see, hmm can-I hmm. Does anybody else have source code to any OEM fuel injection computer? I would like to look at it. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jeff Hansen Anaheim, California, USA JHansen777@xxx.com http://members.gnn.com/JHansen777/car/index.htm Seven pounds of boost is a 'Good-Thing' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ------------------------------ From: MSargent@xxx. Sargent) Date: Thu, 15 Feb 1996 12:03:57 -0500 Subject: Re: Virus This is a hoax. > nth-complexity infinite binary loop ... severely damage the processor Pure BS. +--------------------------------------------------------------------------+ | Michael F. Sargent | Net: msargent@xxx.com | Phone: 1(613)721-0902 | | Gallium Software Inc.| | FAX: 1(613)721-1278 | +--------------------------------------------------------------------------+ ------------------------------ From: Jeff Hansen Date: Thu, 15 Feb 1996 09:35:31 Subject: Re: <911> Bosch Motronic Jim, At Wed, 14 Feb 1996 22:30:19 -0700 you wrote > How about, that I have the SOURCE code to the 911 :) You have source code? How did you get it? Never mind, I don't wanna know ;) Can I see, hmm can-I hmm. Does anybody else have source code to any OEM fuel injection computer? I would like to look at it. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jeff Hansen Anaheim, California, USA JHansen777@xxx.com http://members.gnn.com/JHansen777/car/index.htm Seven pounds of boost is a 'Good-Thing' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ------------------------------ From: Matt Sale Date: Thu, 15 Feb 1996 12:46:57 -0500 (EST) Subject: Re: your mail > > I received this message this morning from a responsible colleauge who > stressed that it is not a joke and is to be taken seriously. > > This is the first I have heard of this problem. However, due to the > potential I am forwarding this information for your review. > > >Beware ! > >_______________________ > > > > > > > > > > COMPUTER VIRUS > > > > There is a computer virus that is being sent across the Internet. If > > you receive an e-mail message with the subject line "Good Times," DO > > NOT read the message, DELETE it immediately. Please read the messages > > below. > > Its a hoax. ------------------------------ From: walter@xxx.com (thomas walter x5955) Date: Thu, 15 Feb 96 12:31:16 CST Subject: "Good times" > > There is a computer virus that is being sent across the Internet. If > > you receive an e-mail message with the subject line "Good Times," Just to save everyone a lot of time and energy, this one has been pretty much debunked. "Good Times" is the name of a video clip that is sent out with the Windows 95 software. Not sure how the "virus" notification got started, but last time I checked the FCC was not involved with wire based communication. ;-) Cheers, Tom Walter Austin, TX. P.S. If anyone does have that video clip... who is the singer? ;-) ------------------------------ From: sandy Date: Thu, 15 Feb 1996 14:00:30 -0500 Subject: Re: MAP Questions... I have them on my BMW, an and earlier BMW. One failed, and the cost was about $1200 USD for the part. Something about overengineering crossed my mind as I wrote the check... At 20:04 14/02/96 PST, you wrote: >>how about a servo controlled throttle plate if done propperly it >>might alliviate alot of efi problems caused by manualy controled >>throttles : just think no more lead foots causing the manafold >>pressure to go down to next to nothing. > >Quick question: Do you REALLY want a computer controlling your throttle >position? Face it, a throttle cable (or linkage) and return spring is >a pretty reliable, and proven, system. It might make things a bit interesting >if the computer decided that the throttle plate was at idle position when it >really was at WOT. And besides, what is wrong with a bit of lead footing? >Next thing you know, you will be suggesting a built-in traction control >system! ;) Actually, I like the idea of being able to use a traction >control. It would come in real handy on ice. I just want to be able to >choose WHEN it does its traction control thing. Later. > >Clint >ccorbin@xxx.com > ********************************** Sandy Ganz sandyg@xxx.com Visix Software Inc. ********************************** ------------------------------ From: "Dan Brown" Date: Thu, 15 Feb 1996 11:41:49 -0800 Subject: Re: > I received this message this morning from a responsible colleauge who > stressed that it is not a joke and is to be taken seriously. It may not be a joke, but it's BS. It's impossible to transmit a virus in such a way that reading your e-mail will infect you. - -- Dan Brown, KE6MKS, danb@xxx.com Don't tread on me. E-Mail may be published at my discretion. ------------------------------ From: Jeff Hansen Date: Thu, 15 Feb 1996 11:41:27 Subject: Re: <911> Bosch Motronic Jim, At Wed, 14 Feb 1996 22:30:19 -0700 you wrote > How about, that I have the SOURCE code to the 911 :) You have source code? How did you get it? Never mind, I don't wanna know ;) Can I see, hmm can-I hmm. Does anybody else have source code to any OEM fuel injection computer? I would like to look at it. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jeff Hansen Anaheim, California, USA JHansen777@xxx.com http://members.gnn.com/JHansen777/car/index.htm Seven pounds of boost is a 'Good-Thing' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ------------------------------ From: Rod Barman Date: Thu, 15 Feb 1996 12:05:17 UTC-0800 Subject: Re: <911> Bosch Motronic > You have source code? How did you get it? He reverse engineered if from the binary eprom image using only publically available documentation. The TOTALLY LEGAL WAY. I know this for a fact. - ---rod. - -- Rod Barman, IRIS ISDE-6 @ Laboratory for Computational Intelligence University of British Columbia rodb@xxx.ca ------------------------------ From: "Patrick C. Mancuso" Date: Thu, 15 Feb 1996 15:43:46 -0500 (EST) Subject: Re: Dan Brown: > > > I received this message this morning from a responsible colleauge who > > stressed that it is not a joke and is to be taken seriously. > > It may not be a joke, but it's BS. It's impossible to transmit a > virus in such a way that reading your e-mail will infect you. Oh I wouldn't go that far. The hoax note is itself the email (pseudo)virus; his mailbox was 'infected' with the note, and he turned around and infected all of our mailboxes with it. No automatic infection/ transport mechanism, no serious system side-effects, but still a virus of sorts... Pat ------------------------------ From: neville@xxx.COM (Neville Newman) Date: Thu, 15 Feb 1996 13:12:47 -0800 Subject: Re: > > It may not be a joke, but it's BS. It's impossible to transmit a > virus in such a way that reading your e-mail will infect you. While this joke/hoax has been around for quite a while, the statement that E-mail transmitted viruses are impossible is false. As i'm sure many of you are aware after this past summer, it can certainly be done. It has been recognized as a possibility for a long time. So, don't propagate the "Good Times" hoax, but don't think it can't happen. -neville ------------------------------ From: MSargent@xxx. Sargent) Date: Thu, 15 Feb 1996 15:07:34 -0500 Subject: Re: "Good times" > who is the singer? Eadie Brikel (sp?). Nice, eh? +--------------------------------------------------------------------------+ | Michael F. Sargent | Net: msargent@xxx.com | Phone: 1(613)721-0902 | | Gallium Software Inc.| | FAX: 1(613)721-1278 | +--------------------------------------------------------------------------+ ------------------------------ From: "Brian Warburton, c/o Turbo Systems Ltd" Date: Thu, 15 Feb 1996 21:51:46 Subject: Re: Multiprocessor system > Would it be possible to make some sort of FIFO structure that kept track of >the time to go into the output compare, and a mask to tell you which >injector to be turned off? Given that you know how many cylinders you have(I >hope :), the FIFO can be of a fixed size:2 bytes for OC value, 1 for mask per >cylinder, with an extra pair of bytes to tell you where the beginning and >end of the valid info is. Every time the OC was triggered, it could load the >next value from the queue into the OC. You'd need an available output port >to do this, but I think it could be done. One potential problem would be if >two injectors were to be closed in a time frame shorter than the length of >time for the interupt to be serviced. This shouldnt be too much a problem if >the OC is kept as a high priority, and the interrupts aren't too long. How >does the aftermarket deal with this? Or do they use chips with more output >compares? Can't remember who it was that asked for more info/details on the 80c196 for automotive use,but the note above has pretty adequately described the functionality of the HSO unit on the more base-level 80c196 chips. (The newer/later ones have even more super-duper I/O and interrupt hardware). On the "base-level" 80ca96 chip, you have a hardware carousel which you throw output requests and times in and the hardware does the rest. Every tick it checks every entry in the carousel, when it finds one due it takes the appropriate output action and then (optionally) deletes the request from the carousel. One output compare driving a multitude of o/p pins and or software interrupts. The HSI system works in a similar way for inputs, it time-tags them and sticks them in a FIFO ready for the s/w to read when required. The Ford 8061/8065's work in the same way but have more carousel slots available. All in all the Ford chips outperform the 80c196 series in a lot of ways which is surprising considering the 8096/80c196 were based on the Ford chips. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Brian Warburton, "Still searching for the perfect curve....." email: bwarb@xxx.net Advanced Automotive Electronics Ltd, Van-Nuys House, Scotlands Drive, Farnham Common, England. SL2-3ES ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ------------------------------ From: "Brian Warburton, c/o Turbo Systems Ltd" Date: Thu, 15 Feb 1996 21:51:46 Subject: Re: Multiprocessor system > Would it be possible to make some sort of FIFO structure that kept track of >the time to go into the output compare, and a mask to tell you which >injector to be turned off? Given that you know how many cylinders you have(I >hope :), the FIFO can be of a fixed size:2 bytes for OC value, 1 for mask per >cylinder, with an extra pair of bytes to tell you where the beginning and >end of the valid info is. Every time the OC was triggered, it could load the >next value from the queue into the OC. You'd need an available output port >to do this, but I think it could be done. One potential problem would be if >two injectors were to be closed in a time frame shorter than the length of >time for the interupt to be serviced. This shouldnt be too much a problem if >the OC is kept as a high priority, and the interrupts aren't too long. How >does the aftermarket deal with this? Or do they use chips with more output >compares? Can't remember who it was that asked for more info/details on the 80c196 for automotive use,but the note above has pretty adequately described the functionality of the HSO unit on the more base-level 80c196 chips. (The newer/later ones have even more super-duper I/O and interrupt hardware). On the "base-level" 80ca96 chip, you have a hardware carousel which you throw output requests and times in and the hardware does the rest. Every tick it checks every entry in the carousel, when it finds one due it takes the appropriate output action and then (optionally) deletes the request from the carousel. One output compare driving a multitude of o/p pins and or software interrupts. The HSI system works in a similar way for inputs, it time-tags them and sticks them in a FIFO ready for the s/w to read when required. The Ford 8061/8065's work in the same way but have more carousel slots available. All in all the Ford chips outperform the 80c196 series in a lot of ways which is surprising considering the 8096/80c196 were based on the Ford chips. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Brian Warburton, "Still searching for the perfect curve....." email: bwarb@xxx.net Advanced Automotive Electronics Ltd, Van-Nuys House, Scotlands Drive, Farnham Common, England. SL2-3ES ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ------------------------------ From: Mitsu16v@xxx.com Date: Thu, 15 Feb 1996 19:11:03 -0500 Subject: Re: "Good times" In a message dated 96-02-15 14:31:13 EST, you write: >"Good Times" is the name of a video clip that is sent out with the >Windows 95 software. Not sure how the "virus" notification got started, >but last time I checked the FCC was not involved with wire based >communication. ;-) > >Cheers, > >Tom Walter >Austin, TX. > >P.S. If anyone does have that video clip... who is the singer? ;-) > > Well I agree that it is a hoax.. but I am running Win95 and I'm unable to find anything called "Good Times" on my HDD ------------------------------ From: "Dan Brown" Date: Thu, 15 Feb 1996 16:00:48 -0800 Subject: Re: "Good Times" hoax > While this joke/hoax has been around for quite a while, the statement > that E-mail transmitted viruses are impossible is false. As i'm sure OK, let me rephrase my statement--it's impossible to get a virus by just reading your e-mail. Infected binaries can, of course, be distributed via e-mail, but you'd need to decode and execute them to get infected. - -- Dan Brown, KE6MKS, danb@xxx.com Don't tread on me. E-Mail may be published at my discretion. ------------------------------ From: Mitsu16v@xxx.com Date: Thu, 15 Feb 1996 19:11:06 -0500 Subject: Re: No Subject Get a grip.. this has been said SEVERAL times, and found to be a hoax ------------------------------ From: Mitsu16v@xxx.com Date: Thu, 15 Feb 1996 19:11:01 -0500 Subject: Re: Virus In a message dated 96-02-15 13:20:28 EST, you write: >This is a hoax. > >> nth-complexity infinite binary loop ... severely damage the processor > >Pure BS. > > AMEN!! Well said!!! I have been an AOL user for 2 years now and have heard this SEVERAL times.. it is ALWAYS a load! ------------------------------ From: Land Shark Date: Thu, 15 Feb 1996 17:13:46 -0700 (MST) Subject: Re: <911> Bosch Motronic On Thu, 15 Feb 1996, Rod Barman wrote: > He reverse engineered if from the binary eprom image using only publically > available documentation. The TOTALLY LEGAL WAY. I know this > for a fact. Yes, and as a matter of fact, I had lots of help from a very smart guy who wishes to remain anonymous ... Jim ------------------------------ From: "Jim Staff" Date: Fri, 16 Feb 1996 01:47:56 GMT Subject: 286 Vindication A 286 is devinatly limited when it comes to ports. Serial, IDE, etc.... But I'll Use an ISA card to just create a new device on the bus. I've got 16 decoded address spaces on the cards design that is butloads for my application. The onboard timer is real crap, So I have an external counter timer do my work. I Run the system with D type flip flops as you can Imagine... When I get it all together I'll post it on the web Page... Besides I'm going to use a MPX2200, A motorola pressure sensor rated for 200KPA, with .2mV per KPA, it has thermal recalibration, and as a plus It has differential input so that the values stay pretty good across the spectrum. I op amp it so that It's span is 2V with an offset of .25V, it's great!!!! ------------------------------ From: dzorde@xxx.au Date: Fri, 16 Feb 96 10:10:53 Subject: Re[2]: "Good times" >"Good Times" is the name of a video clip that is sent out with the >Windows 95 software. Not sure how the "virus" notification got started, >but last time I checked the FCC was not involved with wire based >communication. ;-) Does anyone remember the old TV show "GOOD TIMES" with Jimmy, mabye this is it. ------------------------------ From: Johnny Date: Thu, 15 Feb 1996 19:16:43 -0800 Subject: Re: Re[2]: "Good times" dzorde@xxx.au wrote: > > > >"Good Times" is the name of a video clip that is sent out with the > >Windows 95 software. Not sure how the "virus" notification got started, > >but last time I checked the FCC was not involved with wire based > >communication. ;-) > > Does anyone remember the old TV show "GOOD TIMES" with Jimmy, mabye this is > it. Now that WAS a virus for sure! - -j- ------------------------------ From: Mitsu16v@xxx.com Date: Thu, 15 Feb 1996 22:49:42 -0500 Subject: Re: In a message dated 96-02-15 16:23:36 EST, you write: >> It may not be a joke, but it's BS. It's impossible to transmit a >> virus in such a way that reading your e-mail will infect you. > >Oh I wouldn't go that far. The hoax note is itself the email (pseudo)virus; >his mailbox was 'infected' with the note, and he turned around >and infected all of our mailboxes with it. No automatic infection/ >transport mechanism, no serious system side-effects, but still a virus >of sorts... > >Pat Hmm.. very interesting way to look at it. I see your point. ------------------------------ From: Mitsu16v@xxx.com Date: Thu, 15 Feb 1996 22:50:04 -0500 Subject: Re: In a message dated 96-02-15 16:59:55 EST, you write: > the statement >that E-mail transmitted viruses are impossible is false. As i'm sure >many of you are aware after this past summer, it can certainly be >done. It has been recognized as a possibility for a long time. Hmm.. must have missed something... How can it be done? ------------------------------ From: dn Date: Thu, 15 Feb 96 20:55:53 MDT Subject: Re: and a good time was had by all Little early for April Fool's, no? - -- - --------------------------------------------------------------------- Darrell A. Norquay Internet: dn@xxx.ca Datalog Technology Inc. Bang: calgary!debug!dlogtech!darrell Calgary, Alberta, Canada Voice: +1 (403) 243-2220 Fax: +1 (403) 243-2872 @ + < __/ "Absolutum Obsoletum" - If it works, it's obsolete -------------------------------------------------------------------- ------------------------------ From: Steve Baldwin Date: Fri, 16 Feb 1996 18:18:08 +1300 (NZDT) Subject: Re: Looking for low-cost ignition analysis 'scope You can use a clothes peg and a bit of foil to make a capacitive clamp. You almost don't need the foil. Just use the peg to clip a bit of wire to the spark lead and make a capacitive divider by putting a high voltage 1nF cap across the scope input. A bleeder resistor across the 1nF is a good idea. It isn't calibrated but it shows what you want to see. An inductive clamp is going to show you the current flowing which isn't quite the same. A fast (as in spark breakdown) current probe is serious dollars. Hmmm ... so far we have clothes peg ignition analysers (Peter, should that have a 'z' ?) , saw blade timing wheels and light bulb flow meters. Thisis _real_ DIY. :-) Steve. ------------------------------ From: dzorde@xxx.au Date: Fri, 16 Feb 96 13:50:16 Subject: Re[2]: >> the statement >>that E-mail transmitted viruses are impossible is false. As i'm sure >>many of you are aware after this past summer, it can certainly be >>done. It has been recognized as a possibility for a long time. >Hmm.. must have missed something... How can it be done? Good point, mabye it could spread to EFI computers as well? Do I see a potential for an X-files episode here or what. ------------------------------ End of DIY_EFI Digest V1 #44 **************************** 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".