DIY_EFI Digest Saturday, August 7 1999 Volume 04 : Number 455 In this issue: Motronic Checksums Re: DRAC and Tranny computers. 4L60-E Aftermarket controller TPI into a 86 4x4 Suburban PART 2 Long New list member, TBI question. Message from CSH, HQ See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Sat, 7 Aug 1999 10:46:54 +0100 From: "Alan Smith" Subject: Motronic Checksums This is a multi-part message in MIME format. - ------=_NextPart_000_000A_01BEE0C2.2A207500 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Does anyone know whinch Motronic versions use checksums and which do not = ? I saw a thread which suggested that M1.3 used multiple checksums. Does = anyone know if this is true ? I am mainly interested in M1.5. Can anyone identify the Harris chip or = the Injector drivers in this ECU ? Alan Smith - ------=_NextPart_000_000A_01BEE0C2.2A207500 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Does anyone know whinch Motronic = versions use=20 checksums and which do not ?
 
I saw a thread which suggested that M1.3 used = multiple=20 checksums. Does anyone know if this is true ?
 
I am mainly interested in M1.5. Can anyone identify = the Harris=20 chip or the Injector drivers in this ECU ?
 
Alan Smith
 
 
- ------=_NextPart_000_000A_01BEE0C2.2A207500-- ------------------------------ Date: Sat, 07 Aug 1999 07:30:14 -0400 From: Shannen Durphey Subject: Re: DRAC and Tranny computers. > > Date: Fri, 06 Aug 1999 09:40:18 -0400 > From: "Peter D. Hipson" > Subject: DRAC and Tranny computers. > > At 05:00 8/6/99 -0400, you wrote: > > > >Look up input ratio on chart to find proper jumper settings. > > > > Chart, what chart? You have a chart? I'd really, really like to see a copy > of it (fax, scan, whatever). > My apologies. I thought I sent ya a copy. It's on the ftp site now. ftp://efi332.eng.ohio-state.edu/incoming/ look for dracnfo.zip Shannen ------------------------------ Date: Sat, 7 Aug 1999 09:18:35 EDT From: Chipsbyal@xxx.com Subject: 4L60-E Aftermarket controller Hope this helps. I found this company in Transmission Digest magazine. They have a product called ePlace Retrofit. Check out there Web page www.autotransinc.com or call 1.888.453.3767. There are quite a few other useful products on their page. ------------------------------ Date: Fri, 06 Aug 1999 23:01:49 -0600 From: "David C. Allen" Subject: TPI into a 86 4x4 Suburban PART 2 Long First I would like to thank everyone for the information they provided on the change to TPI fuel injection for our 1986 Chevy Suburban 4x4. I have purchased a 1990 suburban fuel tank, sending unit and some of the fuel lines. I understand that I must change the fuel pump, to a higher pressure pump, like one from a Camaro with TPI. So my first question is there a good place on the web to purchase the fuel pump, the local chevy dealer wants about $100 for a new AC Delco pump and new input filter. Second is there a better pump to use?? Third question, I would like to install the tank and lines as the first phase of the conversion, but I want to run the stock mechanical engine driven pump. Do you guys think there would be a problem sucking the fuel through the un-powered in-tank pump. Fourth Question: Chevy uses a o-ring, Saginaw flare to connect the high pressure fuel lines, and I was wondering if anyone knows who or where one can get steel tubing flared. Power steering hoses use this type of flare. | | _| |_ [_ _] Saginaw flare |__| O-ring side I am going to use 89 Corvette 350 engine fuel lines, because the suburban chassis fuel lines are on the passenger side. Chevy Corvette part # 10052171 and 10052172. GM just discontinued the 10052172 part so I was going to bend the steel tubing and wanted it to look stock so I need to flare the ends. Anyone know where to locate used corvette parts, like fuel lines. Fifth Question Passenger side fuel lines presents a problem with the TPI fuel rail, because most TPI fuel rails are for F body cars and the TPI fuel lines enter from the Drivers side. So I need to find a corvette or "Accel" right side TPI fuel rail because the fuel lines enter from the passenger side.. Any suggestions on where to find a fuel rail. Again if this is not the proper forum please let me know Thanks David ------------------------------ Date: Sat, 7 Aug 1999 10:10:21 -0700 From: "Marvin Johnson" Subject: New list member, TBI question. Hi, I recently purchased the computer harness etc for an 88 Astro van 4.3 with the intent of putting it on my Jeep 258. I understand the process of retro fitting the TBI. However, I have come into possession of the EFI manifold and injectors for a 4.0 jeep motor, but I don't have the computer or associated parts. Is it possible to drive the six injectors with the TBI computer? I understand I would have to fire the injectors in two groups. How would I wire this, injectors in series, parallel, or is it more complex than this? Any help is appreciated. Marvin Johnson Spokane Washington ------------------------------ Date: Sat, 7 Aug 1999 13:03:54 -0500 From: nacelp@xxx.com (CSH-HQ) Subject: Message from CSH, HQ Well, hope ya enjoyed the holidays, the dwarfs have been recalled to duty so, here we go, again thanks Gar, for the up date. Pardon my tardiness, but only email so far, working on archives next. Cheers Bruce ------------------------------ End of DIY_EFI Digest V4 #455 ***************************** 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".