DIY_EFI Digest Thursday, 2 May 1996 Volume 01 : Number 127 In this issue: [admin] List services (automated monthly post) Weber Flow rating Re: EEC-IV Questions Re: EEC-IV Questions Re: Honda UEGO Sensor... Re: Honda UEGO Sensor... Octane Test? See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: jsg (John S Gwynne) Date: Wed, 1 May 1996 06:10:07 -0400 Subject: [admin] List services (automated monthly post) This message is post monthly as a reminder of the available list services. For help: Send "help" to Majordomo@xxx. To post: Send to "[list name]@xxx.edu" To subscribe: Send to Majordomo@xxx.edu subscribe [list name] [your email address *only* if different than your "From" address] To unsubscribe: Send to Majordomo@xxx.edu unsubscribe [list name] [your *registered* email address if different than your "From" address] The archives to all the mailing lists are available through Majordomo. Send "index [list name]" to Majordomo@xxx. You will find a file "archive_date_index" whose contents show the period covered by each of the archive files "archive_num_*". Digest mode is available for all of the mailing list. Send "lists" to Majordomo for a listing a mailing lists served. To switch to the digest mode, unsubscribe to the regular list and then subscribe to the digest version (i.e., diy_efi-digest). WWW sites: diy_efi http://www.cpsc.ucalgary.ca/~fridman/diy_efi http://www.cim.swin.edu.au/~aden/web-docs/efi332/332_index.html Other related sites: http://devserve.cebaf.gov/~bowling/ http://spbted.gtri.gatech.edu:80/hpe/hpe.html Please send information to be added to this posting to jsg@xxx. John ------------------------------ From: "Grigoris Dimitriadis" Date: Wed, 1 May 1996 16:35:44 +0300 (EET) Subject: Weber Flow rating Hi all Does anybody know the flow rating of the Weber 2583/10 injector ??? Thanks in advance greg@xxx.gr ------------------------------ From: JON RICHARD HERR Date: Wed, 1 May 1996 13:37:15 -0600 (MDT) Subject: Re: EEC-IV Questions On Thu, 11 Apr 1996, Edward Hernandez wrote: > "To the best of my knowledge, there were no sensor and/or actuator > failures that would cause this condition." > > A couple years ago, I calibrated some operating modes for the Mark > VIII so it would run without the MAS hookedup. I'm trying to remember > if we actually called it a limp-home mode or just a failure manage- > ment mode. Now that I think about it, I wound't really call that a > full limp home mode. It was more like a limp-without-the-MAS-mode, > something we needed in case the MAS broke or someone forgot to > hook it up after changing the air filter. What's the s/w? > I have a question pertaining to the ford EEC-IV. Does it support real time data output of sensor readings in any fashion? I don't want to use a break-out box, and I would suspect that this sort of function would be desireable but I have not had any luck in getting a definitive yes or no as to the EEC-IV's true capablilies. Thank You, Jon Herr (jherr@xxx.com) ------------------------------ From: "Brian Warburton, c/o Turbo Systems Ltd" Date: Wed, 01 May 1996 22:54:16 Subject: Re: EEC-IV Questions >I have a question pertaining to the ford EEC-IV. Does it support real >time data output of sensor readings in any fashion? > Depends on how old your EEC-iv is. I recall that the later ones provided that sort of information when coupled to an SBDS rig (go see your local dealer and ask to see his Service Bay Diagnostics System). I'm not too sure on the availability of SBDS rigs in the U.S., but I'd guess you'd be hard pressed to get the required information on the comms protocol on the SCP link, let alone the message/packet formats and security codes from FOMOCO unless you were a real dealer ...... So I guess the answer to your question is Yes with the above reservations .......... good luck :^) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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: Mike Klopfer Date: Wed, 1 May 1996 21:05:47 -0500 (CDT) Subject: Re: Honda UEGO Sensor... lndshrk@xxx.com wrote: > I believe that the 1986 Honda Sensor is simply a current driven diffusion coated > leanburn sensor ... like a carefully designed HEGO with a special diffusion coating, > it is driven at a carefully selected voltage, with the current proportional to the > AFR ... This suggests that a normal EGO can't be used in the rich region. This is contradictory to my understanding of the SAE paper 890299 which I attempted to describe in a previous post. In that paper they showed a voltage versus current diagram for a normal ego at various rich and lean lambda. The diffusion limited current for the lean region was in the opposite direction of the current for the rich region. For the rich region the O2 was pumped from the atmosphere to the exhaust side where it combined with the CO and H2. In this region the current was limited by the diffusion rate of the CO and H2 (and perhaps the reaction rate of these with the O2). For the lean region the diffusion limited current was from the exhaust side to the atmosphere and was limited by the diffusion rate of the O2 on the exhaust side. ------------------------------ From: Land Shark Date: Wed, 01 May 1996 23:38:24 -0600 Subject: Re: Honda UEGO Sensor... At 21:05 5/1/96 -0500, you wrote: >This suggests that a normal EGO can't be used in the rich region. Misunderstanding .. what happens to the voltage on the rich side is dependent upon whether the other electrode is in AIR or EXHAUST The original Honda leanburn was SET UP for lean only .. The NTK/HONDA UEGO goes both rich/lean .. As would the original sensor if it were constructed differently Jim ------------------------------ From: Karl Hafen Date: Thu, 2 May 1996 00:07:43 -0600 Subject: Octane Test? Hello, I'm kind of new to the list and would like to know if anyone knows of a non-laboratory way of testing pump-gas octane. ------------------------------ End of DIY_EFI Digest V1 #127 ***************************** 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".