DIY_EFI Digest Friday, June 18 1999 Volume 04 : Number 364 In this issue: Re: low cost embedded PC's Re: Locating maps in an ECU RE: Locating maps in an ECU Dual fuel PFI rails - now PFI/TBI Re: o2 sensor hook-up Re: Buick V-6, was Prowler V6 Re: o2 sensor hook-up Re: Chev DOHC 3.4 V6 Re: Not Found New Promedit available Re: low cost embedded PC's Re: low cost embedded PC's humidity sensors checking L-jetronic airflow meters RE: Non-diy_efi, dyno help Re: checking L-jetronic airflow meters RE: Subject: Not diy_efi....how to disable a computer carb M/C solenoid thread RE: Will Chevy Mount to GMTH425 Toronado/Eldorado Transaxle? Re: Subject: Not diy_efi....how to disable a computer carb Re: Will Chevy Mount to GMTH425 Toronado/Eldorado Transaxle? Re: Subject: Not diy_efi....how to disable a computer carb Re: Combustion Pressure Sensor - revisited computer chip Re: computer chip Re: computer chip Re: computer chip Re: computer chip Re: computer chip RE: Will Chevy Mount to GMTH425 Toronado/Eldorado Transaxle? Re: Combustion Pressure Sensor - revisited See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Thu, 17 Jun 1999 22:01:28 +1000 From: Peter Gargano Subject: Re: low cost embedded PC's Okay - here's a thought... The other day, at a trash-and-treasure sale at the local shopping centre, I picked up a few different printer ethernet controller units. These have a 10baseT and/or 10base2 connector and one or two parallel ports and sometimes a serial port too. They are used on a network to connect PCs to a networked printer. Two of them had 80C188 microcontrollers and another two had Z180s. Two even had large flash ROMs. All of them, except the Intel unit, also came in a nice brushed aluminium box. I payed $2.00 each (on average) for these "gems" and I started to think what other uses I could put them to. Gee, whaddya know.... So, here's my new (long term) project, the $2.00 EFI. Anyone interrested? regards, - -- Peter Gargano ------------------------------ Date: Thu, 17 Jun 1999 08:07:45 -0400 From: Shannen Durphey Subject: Re: Locating maps in an ECU AS&M Shannen Knowlden and/or Eller wrote: > > So, Shannon where to we get this software? > > Bob Knowlden > > -----Original Message----- > From: owner-diy_efi@xxx.edu > [mailto:owner-diy_efi@xxx.edu]On Behalf Of Shannen > Durphey > Sent: Tuesday, June 15, 1999 11:24 PM > To: diy_efi@xxx.edu > Subject: Re: Locating maps in an ECU > > Charles Brooks wrote: > > > > I was looking over some of the stuff on the site and I've got an idea. If > I simply plot EVERYTHING in the ECU I should be able to see all of the 2D/3D > maps right? They should look like ramps or some sort of regular waveform. > I'm not sure if that's right or not but I'll go ahead and try it and let you > guys know what I get. Yesterday I was unable to find a serial cable long > enough to get to the Data I/O PROM reader we have here at work, but I have > one now :) I'll dump the PROM at lunch and import the data to Excel and see > what I can see. > > FYI, there's an expensive piece of "tuning" software that does little > more than what you're thinking. It's actually a 2d plot of everything > done in DOS. Tables usually look like sawtooth patterns. Something > that's helpful is the ability to load and compare two proms , both > with overlapping graphic plots and with a list of differing bytes and > their values. > > Shannen ------------------------------ Date: Thu, 17 Jun 1999 14:59:11 +0200 From: Carsten Meyer Subject: RE: Locating maps in an ECU >So, Shannon where to we get this software? > >Bob Knowlden > >-----Original Message----- >From: owner-diy_efi@xxx.edu >[mailto:owner-diy_efi@xxx.edu]On Behalf Of Shannen >Durphey >Sent: Tuesday, June 15, 1999 11:24 PM >To: diy_efi@xxx.edu >Subject: Re: Locating maps in an ECU > > >Charles Brooks wrote: >> >> I was looking over some of the stuff on the site and I've got an idea. If >I simply plot EVERYTHING in the ECU I should be able to see all of the 2D/3D >maps right? They should look like ramps or some sort of regular waveform. >I'm not sure if that's right or not but I'll go ahead and try it and let you >guys know what I get. Yesterday I was unable to find a serial cable long >enough to get to the Data I/O PROM reader we have here at work, but I have >one now :) I'll dump the PROM at lunch and import the data to Excel and see >what I can see. > >FYI, there's an expensive piece of "tuning" software that does little >more than what you're thinking. It's actually a 2d plot of everything >done in DOS. Tables usually look like sawtooth patterns. Something >that's helpful is the ability to load and compare two proms , both >with overlapping graphic plots and with a list of differing bytes and >their values. > >Shannen Seriously: Convert the .bin to a .wav file and read it into a ... windows-based shareware sound editor! Looks nice, shows all the sawtooth tables and their adresses ("samples"). And does nearly the same job as the mentionend AZS&M carPROM software. You might even "edit" the tables if you know where you are. But don't forget the checksum. Yours sincerely, Carsten R. Meyer, c't editorial staff - ------------------------------------------------------------------ Carsten R. Meyer, editorial staff Tel: +49 (0)511 53 52-300 c't magazin fuer computertechnik Fax: +49 (0)511 53 52-417 Verlag Heinz Heise GmbH & Co KG EMail: cm@xxx.de Helstorfer Str. 7 private EMail: stinbovist@xxx.net D-30625 Hannover Germany http://www.heise.de/ct/Redaktion/cm/ - ------------------------------------------------------------------ This sentence no verb. ------------------------------ Date: Thu, 17 Jun 1999 08:57:13 -0400 From: Barry Tisdale Subject: Dual fuel PFI rails - now PFI/TBI Hummmmm..... The more I think about Stephen's idea, the better it sounds. The TB on my 4.3l Sy is supposedly the same as used on the 5.7l Chev engines; no injectors on mine, of course. Can anyone tell me specifically: What vehicles come w/ 5.7l TBI? My local junkyard is run by troglodytes (lots of weddings after family reunions around here...) & requires very specific information. I need to pick up one to check it out. Would the electrical (injector) system that now runs 6 PFI injectors run the one (?) or two(?) found on the TBI? I would guess yes, probably just a straight connection. For normal, around town use, would you use the TBI or PFI circuits, assuming the engine had both installed? Thanks to this suggestion, beginning to sound like a very do-able project! Thanks much - Barry At 03:17 PM 6/16/99 -0500, you wrote: >Hmmm....That statement made me think of a dual fuel system for my TBI >Camaro with a PFI setup on the stock manifold. TBI for economy and PFI >for power? Just a random thought.... >-- >Stephen Cranford http://cranford.home.texas.net >92 RS Sapphire Blue w/Purple Pearl & White Stripes >86 IROC-Z28 Red w/black hood >89 GMC 4WD 1/2 ton Suburban "I don't suffer from insanity...I enjoy every minute of it!"--bumper >sticker > ------------------------------ Date: Thu, 17 Jun 1999 09:33:36 -0400 From: Bill Shaw Subject: Re: o2 sensor hook-up Hi guys, I just installed the o2 sensor in my exhaust for my efi conversion. I don't have the ecu installed yet, and it may be a couple of weeks before I get a chance to install it. In the mean time I'd like to hook it up to a display to see what the carb's doing to the a/f ratio. I saw a posting a couple of weeks ago about supplying a .5V bias to the sensor. Do I need to do this to get a reading from the sensor? What kind of a supply circuit do I need? Or is the o2 sensor generating a voltage that I can just feed into the display? I'm using the Intelitronix LED bar graph a/f ratio display from JC Ripme. Same circuit as floating around here, but it's packaged real nice. It's worth the $40 for the clean packaging, IMHO. Thanks, Bill ------------------------------ Date: Thu, 17 Jun 1999 09:53:41 -0400 From: "Gary Derian" Subject: Re: Buick V-6, was Prowler V6 I go to the local discount store and get some bicycle brake cable. Disassemble the OE throttle cable and put the bike cable in the molded end pieces. You can make the cable as long as you want. Gary Derian >Todd....!! wrote: > Just tryin to find a long nuff throttle cable to reach the dern carb > once I put the thing on the engine! Any ideas? > ------------------------------ Date: Thu, 17 Jun 1999 09:47:06 -0400 From: "Gary Derian" Subject: Re: o2 sensor hook-up All you need is a high impedance volt meter. When the sensor warms up, you will get 200 mv lean and 800 mv rich. The bias voltage is only for the ECM to know what is happening. Gary Derian > Hi guys, > > I just installed the o2 sensor in my exhaust for my efi conversion. I > don't have the ecu installed yet, and it may be a couple of weeks before I > get a chance to install it. In the mean time I'd like to hook it up to a > display to see what the carb's doing to the a/f ratio. I saw a posting a > couple of weeks ago about supplying a .5V bias to the sensor. Do I need to > do this to get a reading from the sensor? What kind of a supply circuit do > I need? Or is the o2 sensor generating a voltage that I can just feed into > the display? I'm using the Intelitronix LED bar graph a/f ratio display > from JC Ripme. Same circuit as floating around here, but it's packaged real > nice. It's worth the $40 for the clean packaging, IMHO. > > Thanks, > > Bill > ------------------------------ Date: Thu, 17 Jun 1999 11:20:09 EDT From: KD6JDJ@xxx.com Subject: Re: Chev DOHC 3.4 V6 I need some 'timing' information on the intermediate shaft for the repair of a Lumina engine 3.4 DOHC V6. I'm pretty sure that my questions are easy to answer, if you have any experience with this engine. What is driven from the intermediate shaft that involves 'timing' ? The pulley on my engine has no timing mark. The books all imply that a timing mark is needed to 'time' the crank to the cams . I offer my apologies to anyone offended by my posting this question on this EFY site. I just havent found a site with the quality of thinking power that I find here. Thanks Jerry E-mail to KD6JDJ@xxx.COM ------------------------------ Date: Thu, 17 Jun 1999 10:37:09 -0500 From: steve ravet Subject: Re: Not Found Oops. I moved them out of the ftp directory but forgot to change the links. They're OK now. - --steve Geoff Richards wrote: > > Hi group > I am receiving message 'file not found' when trying to get description of > test bench > from GM-ECM page > Anyone? > Thanks > Geoff Richards - -- Steve Ravet steve.ravet@xxx.com Advanced Risc Machines, Inc. www.arm.com ------------------------------ Date: Thu, 17 Jun 1999 10:51:29 -0500 From: steve ravet Subject: New Promedit available Wayne just sent me version 6 of Promedit, and it is available in the incoming directory at ftp://efi332.eng.ohio-state.edu/incoming/promedit_06.zip Enjoy! - --steve - -- Steve Ravet steve.ravet@xxx.com Advanced Risc Machines, Inc. www.arm.com ------------------------------ Date: Thu, 17 Jun 1999 11:01:11 -0400 From: "Peter D. Hipson" Subject: Re: low cost embedded PC's Well, they are worth every penny you paid for them! The 80188 is basically a 8088 with a few minor enhancements. Now, that said, you could write something on a PC and try to port it over. You'd have to be careful, but it is doable. You could write in C, or Assembly. At 10:01 PM 6/17/99 +1000, you wrote: >Okay - here's a thought... > >The other day, at a trash-and-treasure sale at the local shopping centre, >I picked up a few different printer ethernet controller units. These have >a 10baseT and/or 10base2 connector and one or two parallel ports and sometimes >a serial port too. They are used on a network to connect PCs to a networked >printer. > >Two of them had 80C188 microcontrollers and another two had Z180s. Two even had >large flash ROMs. All of them, except the Intel unit, also came in a nice brushed >aluminium box. I payed $2.00 each (on average) for these "gems" and I started >to think what other uses I could put them to. Gee, whaddya know.... > >So, here's my new (long term) project, the $2.00 EFI. > >Anyone interrested? > >regards, >-- >Peter Gargano > > Thanks, Peter Hipson (founder, NEHOG) 1995 White NA Hummer Wagon ------------------------------ Date: Thu, 17 Jun 1999 13:45:29 -0400 (EDT) From: Pat Ford Subject: Re: low cost embedded PC's Previously, you (Peter D. Hipson) wrote: > Well, they are worth every penny you paid for them! The 80188 is > basically a 8088 with a few minor enhancements. Now, that said, you could > write something on a PC and try to port it over. You'd have to be careful, > but it is doable. You could write in C, or Assembly. and compile as a *.com you then set the reset vector ( at ffff:fffe) to jump to the start of your program. Then you don't need an os saves lotsa space in those flash chips. the reset vector "should" be the last 2 bytes on the flash > > At 10:01 PM 6/17/99 +1000, you wrote: > >Okay - here's a thought... > > > >The other day, at a trash-and-treasure sale at the local shopping centre, > >I picked up a few different printer ethernet controller units. These have > >a 10baseT and/or 10base2 connector and one or two parallel ports and > sometimes > >a serial port too. They are used on a network to connect PCs to a networked > >printer. cool > > > >Two of them had 80C188 microcontrollers and another two had Z180s. Two > even had > >large flash ROMs. just the flash parts are worth more then you paid > All of them, except the Intel unit, also came in a nice > brushed > >aluminium box. I payed $2.00 each (on average) for these "gems" and I > started > >to think what other uses I could put them to. Gee, whaddya know.... > > > >So, here's my new (long term) project, the $2.00 EFI. > > > >Anyone interrested? > > > >regards, > >-- > >Peter Gargano > > > > > Thanks, > Peter Hipson (founder, NEHOG) > 1995 White NA Hummer Wagon - -- Pat Ford email: pford@xxx.com QNX Software Systems, Ltd. WWW: http://www.qnx.com (613) 591-0931 (voice) mail: 175 Terrence Matthews (613) 591-3579 (fax) Kanata, Ontario, Canada K2M 1W8 ------------------------------ Date: Thu, 17 Jun 1999 15:16:20 -0500 From: steve ravet Subject: humidity sensors Wasn't someone interested in measuring relative humidity? This place has some RH sensors, I have no idea what the prices are though... http://www.geinet.com/geiindex.html - --steve - -- Steve Ravet steve.ravet@xxx.com Advanced Risc Machines, Inc. www.arm.com ------------------------------ Date: Thu, 17 Jun 1999 15:29:07 -0500 From: greg kring Subject: checking L-jetronic airflow meters How can a Bosch L-jetronic airflow meter be checked out? Or even set to factory specs? I have a 83 nissan turbo car that running terrible on the top end. It's dumping so much fuel as to stall the motor. Checked all sensors thoroughly except the flow meter. Not sure how to know if it is set right or even reading right. Factory manuals say to just check for continuity. I think it's based on a 5 volt refernce signal that lessens as the airflow increases. CAn I tap into one of the lines and just measure voltage or what? Even used meters are going for upwards of $200, so replacement will only be done if I can tell if this one is bad. Somebody has "been in it" already, so no telling where the spring tension has been moved to. Any ideas or advice? greg ------------------------------ Date: Mon, 14 Jun 1999 13:10:11 -0500 From: Don.F.Broadus@xxx.com Subject: RE: Non-diy_efi, dyno help The eddy current dyno uses a iron drum that rotates around an electro magnet. Since the drum is not laminated like motor stators eddy currents are induced into the iron very easy. A chopped DC or straight DC voltage powers the electromagnet. The eddy currents slow the drum producing a load and also great amounts of heat. An eddy current dyno would make a poor motor since the magnetic losses would be very high. Great dyno find, I wish junk yards around here were that good. Don > -----Original Message----- > From: David Piper [SMTP:dapiper@xxx.net] > Sent: Saturday, June 05, 1999 8:28 PM > To: diy_efi@xxx.edu > Cc: brucep@xxx.net > Subject: Re: Non-diy_efi, dyno help > > Check w/ Mustang Dyno in Twinsburg, OH > > TurboDave > > >My question is this can the eddy current unit from this dyno be used to > make > >a motor dyno? ------------------------------ Date: Thu, 17 Jun 1999 17:26:22 -0400 From: "David A. Cooley" Subject: Re: checking L-jetronic airflow meters At 03:29 PM 6/17/99 -0500, you wrote: >How can a Bosch L-jetronic airflow meter be checked out? Or even set to >factory specs? I have a 83 nissan turbo car that running terrible on the >top end. It's dumping so much fuel as to stall the motor. Checked all >sensors thoroughly except the flow meter. Not sure how to know if it is >set right or even reading right. Factory manuals say to just check for >continuity. I think it's based on a 5 volt refernce signal that lessens >as the airflow increases. CAn I tap into one of the lines and just >measure voltage or what? Even used meters are going for upwards of $200, >so replacement will only be done if I can tell if this one is bad. >Somebody has "been in it" already, so no telling where the spring >tension has been moved to. Any ideas or advice? Hi Greg, I worked on a early 80's 280ZX turbo last summer... It would run ok at WOT, but when you came to a stop, it wouldn't idle... The air meter door was sticking wide open. According to my dad, that was a common problem, as the housing/door weren't machined for a very good fit. Replaced the air meter and all was fine. =========================================================== David Cooley N5XMT Internet: N5XMT@xxx.net Packet: N5XMT@xxx. Member #7068 Sponges grow in the ocean... Wonder how deep it would be if they didn't?! =========================================================== ------------------------------ Date: Tue, 15 Jun 1999 11:10:41 -0500 From: Don.F.Broadus@xxx.com Subject: RE: Subject: Not diy_efi....how to disable a computer carb That is a good fix also. My experience with the M/C solenoids is that the solenoid fails either open or shorted coil so the part will need to be replaced anyway and that could be the only thing wrong and the C3 system might come back on line. > -----Original Message----- > From: neilaura@xxx.com] > Sent: Tuesday, June 15, 1999 8:16 AM > To: diy_efi@xxx.edu > Subject: RE: Subject: Not diy_efi....how to disable a computer carb > > At 03:26 PM 6/14/99 -0500, you wrote: > >I would still check the M/C solenoid. The solenoid controls the primary > >metering rods buy moving them up and down at a duty cycle > >controlled by the ECM and its inputs. My 82 T/A did the same thing your > olds > >is doing , running extremely rich. The Q-Jet runs rich because a spring > on > >the metering rods pulls them completely out of the primary jets. The M/C > >solenoid when energized pushes the rods down into the jets leaning out > the > >mixture. The only way to bypass the M/C solenoid is to convert back to > the > >vac type metering rods if this is possible . Fix the carb or go to a non > >electronic Q-Jet and non computer HEI, of course the ECM now has nothing > to > >do. > >Don > > That's only part of it Don. > When the solenoid pulls the needles down and closes off the jets it, also > opens an air bleed valve to further lean out the mixture. > Possible options are. Physically hold the needles half way in/out of the > jets. Or use a 555 as a base for a generating a 50% square wave, and > disconnect the engine check light. > > Neil ------------------------------ Date: Thu, 17 Jun 1999 16:00:16 -0700 From: "soren" Subject: M/C solenoid thread > That is a good fix also. My experience with the M/C solenoids is that the > solenoid fails either open or shorted coil so the part will need to be > replaced anyway and that could be the only thing wrong and the C3 system > might come back on line. Just for another reference point here, I have repaired a few feedback carbs on GM vehicles where the M/C solenoid appeared to be malfunctioning. In those cases the only thing wrong was the O-ring at the bottom of the solenoid bore was cracked or otherwise deformed. The ring was not standard, it had a little lip around the edge, and of course you can't buy just the O-ring, you had to buy the whole solenoid kit. Soren ------------------------------ Date: Wed, 16 Jun 1999 10:32:09 -0500 From: Don.F.Broadus@xxx.com Subject: RE: Will Chevy Mount to GMTH425 Toronado/Eldorado Transaxle? The trans does use the BOP bolt pattern and while it will physical bolt up some of the holes will be missing. The BOP pattern does not have the top bolt like the chevy does. If you can find a universal dual bolt pattern trans a the junk yard and copy that to steel you can make your own adapter plate. > -----Original Message----- > From: Frederic Breitwieser [SMTP:frederic@xxx.com] > Sent: Tuesday, June 15, 1999 4:31 PM > To: diy_efi@xxx.edu > Subject: Re: Will Chevy Mount to GMTH425 Toronado/Eldorado Transaxle? > > > My question is whether a Chevy small block, or Chevy big block, or a > > Cadillac NorthStar engine will bolt up to this transmission bellhousing. > I > > Yess, Kennedy Advanced Adaptors in CA makes such an adaptor for the > TH425 transaxle, and its simply a 3/8" thick plate, since the inside > diameter of the bellhousing/block spacing is nearly identical. You > could almost make one yourself if you are daring :) > > The Northstar, well, I don't know, but the Chevy will fit. ------------------------------ Date: Thu, 17 Jun 1999 20:17:54 EDT From: ARoss10661@xxx.com Subject: Re: Subject: Not diy_efi....how to disable a computer carb In a message dated 6/17/99 4:51:51 PM Central Daylight Time, Don.F.Broadus@xxx.com writes: << That is a good fix also. My experience with the M/C solenoids is that the solenoid fails either open or shorted coil so the part will need to be replaced anyway and that could be the only thing wrong and the C3 system might come back on line. >> I rebuilt the carb today, the float was trashed as well as the needle and seat. I also found the TPS bad. Replaced all and reinstalled and the car runs great. Thanks for everyone's help Al ------------------------------ Date: Thu, 17 Jun 1999 20:34:31 -0400 From: Frederic Breitwieser Subject: Re: Will Chevy Mount to GMTH425 Toronado/Eldorado Transaxle? > The trans does use the BOP bolt pattern and while it will physical bolt up > some of the holes will be missing. The BOP pattern does not have the top Um, my buick V6 has those two bolt holes :) THreaded too :) Or are there two BOP patterns? Or worse, I'm referring to two different things? ------------------------------ Date: Thu, 17 Jun 1999 21:11:58 EDT From: AL8001@xxx.com Subject: Re: Subject: Not diy_efi....how to disable a computer carb In a message dated 99-06-17 17:51:51 EDT, Don.F.Broadus@xxx.com writes: >My experience with the M/C solenoids is that the >solenoid fails either open or shorted coil so the part will need to be >replaced anyway and that could be the only thing wrong and the C3 system >might come back on line. > > Another problem common to the 2bbl progressive GM carbs ( especially on small 4 cyl) is the tip of the M/C solenoid breaking loose. This causes all sorts of interesting driveability problems. This carb uses a external bolt on valve, not like the internal Q jet metering rod system. Harold ------------------------------ Date: Fri, 18 Jun 1999 12:32:59 +1000 From: Peter Gargano Subject: Re: Combustion Pressure Sensor - revisited Measuring ION current can also do this. Have you seen: http://www.fs.isy.liu.se/%7Elarer/Projects/main.html Lars Eriksson, the author of this information, calls the "sweet spot" the "optimal peak pressure point", or optimal PPP. Tom Sharpe wrote: > > Can measuring crankshaft acceleration per degree dewtermine the sweet spot > and how close you are to it??? TomS - -- Peter Gargano ------------------------------ Date: Thu, 17 Jun 1999 22:49:19 EDT From: ChvyRs92@xxx.com Subject: computer chip I have a little problem with the vats system on my 92 corvette motor. I am putting this motor into another car so I need to disable the vats. Does anyone out there have the capabilities to burn me a chip with the vats removed? ------------------------------ Date: Thu, 17 Jun 1999 22:02:25 -0500 (CDT) From: Roger Heflin Subject: Re: computer chip 92 LT1 vette? Send me the ocmputer numbers, I believe it is the same computer that is in my 93 Z28 LT1, and I might be able to find the vats code int it. If you have a prom reader and can read out the chip and send me a copy of that chip I can see how close the 92 is to the 93. Roger On Thu, 17 Jun 1999 ChvyRs92@xxx.com wrote: > I have a little problem with the vats system on my 92 corvette motor. I am > putting this motor into another car so I need to disable the vats. Does > anyone out there have the capabilities to burn me a chip with the vats > removed? > ------------------------------ Date: Thu, 17 Jun 1999 23:33:25 EDT From: ECMnut@xxx.com Subject: Re: computer chip Roger, The book says same ecm. does this look right from your end? 92-93 vette 5.7, same as 93 Camaro/Firebird 5.7 : 16159278 90-92 Camaro/bird 5.7 is 1227730, 16196344, 16198262 Mike V > 92 LT1 vette? > > Send me the ocmputer numbers, I believe it is the same computer that > is in my 93 Z28 LT1, and I might be able to find the vats code int it. > > If you have a prom reader and can read out the chip and send me a copy > of that chip I can see how close the 92 is to the 93. > ------------------------------ Date: Thu, 17 Jun 1999 20:43:47 -0700 From: Vance Rose Subject: Re: computer chip At 10:49 PM 6/17/1999 EDT, you wrote: >I have a little problem with the vats system on my 92 corvette motor. I am >putting this motor into another car so I need to disable the vats. Does >anyone out there have the capabilities to burn me a chip with the vats >removed? > >Hi I'm out in northern Cal. Post me off list if your close. Vance ------------------------------ Date: Thu, 17 Jun 1999 22:46:58 -0500 (CDT) From: Roger Heflin Subject: Re: computer chip On Thu, 17 Jun 1999 ECMnut@xxx.com wrote: > Roger, > The book says same ecm. > does this look right from your end? > 92-93 vette 5.7, same as 93 Camaro/Firebird 5.7 : 16159278 > 90-92 Camaro/bird 5.7 is 1227730, 16196344, 16198262 > Mike V > Those match my numbers. I guess the real issue is how different is the code in the prom. Hopefully it is just the data that differs. Roger > > 92 LT1 vette? > > > > Send me the ocmputer numbers, I believe it is the same computer that > > is in my 93 Z28 LT1, and I might be able to find the vats code int it. > > > > If you have a prom reader and can read out the chip and send me a copy > > of that chip I can see how close the 92 is to the 93. > > > ------------------------------ Date: Thu, 17 Jun 1999 22:54:46 -0500 From: Steve Ravet Subject: Re: computer chip If you type "vats and disable" into the archive search engine you'll come up with this from John Hess: Change EPROM Memory address &H0016 from &H10 to &H00 Subtract &H10 from what you find at EPROM Memory address &H0007 write the resulting file back to the EPROM. Address &H0016 is the VATS Address &H007 is the low byte of the Checksum. good luck. You can also build an oscillator circuit for about a dollar that fools the vats, or if you have the original key you can measure the resistance of the resistor pellet and solder a resistor of the same value right into the harness. - --steve ChvyRs92@xxx.com wrote: > > I have a little problem with the vats system on my 92 corvette motor. I am > putting this motor into another car so I need to disable the vats. Does > anyone out there have the capabilities to burn me a chip with the vats > removed? - -- Steve Ravet sravet@xxx.com Advanced Risc Machines, INC www.arm.com ------------------------------ Date: Thu, 17 Jun 1999 21:02:20 -0700 From: Aaron Willis Subject: RE: Will Chevy Mount to GMTH425 Toronado/Eldorado Transaxle? At 10:32 AM 6/16/99 -0500, you wrote: >> Yess, Kennedy Advanced Adaptors in CA makes such an adaptor for the >> TH425 transaxle, and its simply a 3/8" thick plate, since the inside >> diameter of the bellhousing/block spacing is nearly identical. You >> could almost make one yourself if you are daring :) >> >> The Northstar, well, I don't know, but the Chevy will fit. > Haven't been following this thread, so please forgive me if it's been mentioned already - Jeg's offers both a BOP-to-Chevy-trans adapter plate and a Chevy-to-BOP-trans version. Both run about $55. Their number is (800)345-4545 or see www.jegs.com . Aaron Willis ICQ #27386985 AOL IM: hemiyota http://surf.to/garage-te51 Garage TE51 International ------------------------------ Date: Fri, 18 Jun 1999 00:12:41 -0700 (PDT) From: Mark Wilcutts Subject: Re: Combustion Pressure Sensor - revisited Yep, you have sensors on all the cylinders, then fuel and spark are optimized individually to give the same IMEP on all cylinders. Everyone knows this CAN be done, it's a question of, can it be done economically. I.e. do the benefits (better performance, fuel economy, emissions, driveability) outweigh the costs (vehicle price increase and possible warranty costs)? OEMs have until now decided the answer is no. On Wed, 9 Jun 1999, Squash wrote: > > Wouldn't it be sweet to instead of compensating for > > to optimize changes on the > > fly. Conceive of each cylinder having optimum > > timing independent of all > > others, each cylinders power exactly matching the > > others etc. > > This sounds like an awesome concept, but if each > cylinder is independent, won't then engine run roughly > and unbalanced? I suppose cooling on each cylinder > would be different, so that would make each cylinder > unique... I suppose A/F flow to each cylinder would > be a tad different, also... > > Neat idea! > > Andy > > _________________________________________________________ > Do You Yahoo!? > Get your free @xxx.com > ------------------------------ End of DIY_EFI Digest V4 #364 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. 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