DIY_EFI Digest Thursday, 17 September 1998 Volume 03 : Number 427 In this issue: Re: Blown Water pump Re: Rotary firings Re: Injector Clean Re: Blown Water pump Re: Injector Clean Re: Injector Clean Re: Nubie Question Re: Lamba sendor readings - advise needed Re: Emulate See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: Clare Snyder Date: Wed, 16 Sep 1998 23:53:15 -0400 Subject: Re: Blown Water pump David A. Cooley wrote: > > Several things... > Was it a rebuilt pump? > I went through 4 rebuilts in a month then broke down and spent the extra > $20.00 for a brand new water pump... No more problems. > Another item is the belt being tensioned too tight... this will wear the > water pump bearings very quickly and cause the shaft seals to leak... > Another option is if the trucj\k has a mechanical fan on the water pump, > ensure it's not bent or out of balance (missing a blade...) > Later, > Dave > > -----Original Message----- > From: Paul Tholey > To: diy_efi@xxx.edu> > Date: Wednesday, September 16, 1998 9:52 PM > Subject: Re: Blown Water pump > > >One possibility that I thought of, but never encountered like you, is a bad > >pulley. It may be glazed and not turning 100% or out of balance. I am > >assuming a non LT1, and serpentine. > > > >Paul > > > > > >At 07:53 AM 9/13/98 -0400, you wrote: > >>Sorry about the non group related content of this message, but I need > >>some great minds. > >>About two weeks ago I replaced a water pump on a small block V8 > >>chevy1993 the customer said he had changed one some time back but I did > >>not bother to ask how long ago. He shows up today and the new pump > >>(2weeks old) is leaking again through the same breather hole in the > >>pump. When I replaced the new pump I also replaced thermostate & rad > >>cap all AC Delco. He now gives me the history ..... this is the third > >>pump in less than 9 months. I am lost for ideas. Is there a GM > >>bulletine covering this defect or is something wrong elsewhere. > >> > >>Martin > >> > >> > >> > > > > Water or antifreeze? If you are in the balmy south and the owner is too tight to buy antifreeze, he WILL buy pumps. The antifreeze lubricates the seals a lot better than water does. - -- _/\_ --|-----([])-----|-- S 0/ \0 B Looks like we've finally fixed it!!! I am still clare.snyder.on.ca@xxx.net Snyder.on.ca is BACK ON THE NET!!! With any luck, I will be Clare@xxx.ca real soon!!! Clare Snyder Waterloo, Ontario ------------------------------ From: Clare Snyder Date: Wed, 16 Sep 1998 23:54:59 -0400 Subject: Re: Rotary firings Bruce Plecan wrote: > > Just a tad rusty here, but (on a 2 rotor rotary), aren't the rotors, and > shaft geared at 1:1,so at 1K rpm there are 2K exhaust pulsations?... > Where as in a 2 cylinder 4 stroke would only have 500 pulsations > per minute at 1K rpm idle?. > EFI content is that this is in reference to O2 sampling. > Cheers > Bruce Nope - usually NOT 1:1 Closer to 3:1 if I remember from back in the R100 and RX3 days when I worked for a Mazda dealership. - -- _/\_ --|-----([])-----|-- S 0/ \0 B Looks like we've finally fixed it!!! I am still clare.snyder.on.ca@xxx.net Snyder.on.ca is BACK ON THE NET!!! With any luck, I will be Clare@xxx.ca real soon!!! Clare Snyder Waterloo, Ontario ------------------------------ From: ChrisBourk@xxx.com Date: Thu, 17 Sep 1998 00:15:50 EDT Subject: Re: Injector Clean In a message dated 98-09-17 00:01:39 EDT, you write: << Hi David Summit sells a Sutton on car cleaner. Connect a bottle of cleaner to your test valve disable the fuel pump and run the kar till bottle is empty. Not as good as bench cleaning, and there are conflicting arguments about injector damage. Still much better than dumping?? in tank :peter >> Does anyone have the number of Summit? And why is it better than putting in the tank? Thanks, Christopher ------------------------------ From: T Hergen Date: Wed, 16 Sep 1998 21:21:11 -0700 (PDT) Subject: Re: Blown Water pump If doubt the following in itself would cause a failure, but it can't hurt to check... If there is a heater core water cutoff valve (usually actuated when the A/C is switched to max), make sure it isn't installed backwards. When properly installed, the water still flows to the valve and back to the engine when the valve is actuated. If backwards, the flow through the heater hoses is stopped completely when the valve is actuated. Mine is now mounted upsidedown because the mechanic who replaced my heater core switched the 5/8" and 3/4" extensions. Tom On Sun, 13 Sep 1998, Martin Powlette wrote: > Sorry about the non group related content of this message, but I need > some great minds. > About two weeks ago I replaced a water pump on a small block V8 > chevy1993 the customer said he had changed one some time back but I did > not bother to ask how long ago. He shows up today and the new pump > (2weeks old) is leaking again through the same breather hole in the > pump. When I replaced the new pump I also replaced thermostate & rad > cap all AC Delco. He now gives me the history ..... this is the third > pump in less than 9 months. I am lost for ideas. Is there a GM > bulletine covering this defect or is something wrong elsewhere. > > Martin > ------------------------------ From: "Bruce Plecan" Date: Thu, 17 Sep 1998 00:39:59 -0400 Subject: Re: Injector Clean - -----Original Message----- From: peter paul fenske To: diy_efi@xxx.edu> Date: Thursday, September 17, 1998 12:10 AM Subject: Re: Injector Clean >Hi David > >Summit sells a Sutton on car cleaner. >Connect a bottle of cleaner to your test valve >disable the fuel pump and run the kar till bottle >is empty. > >Not as good as bench cleaning, and there are >conflicting arguments about injector damage. > >Still much better than dumping?? in tank Well working at dealerships we used the pressureized can stuff, and had at least good results. Working on neighbors cars, and me own the in tank stuff worked well. I wouldn't take bets over if one is really better than the other. Pressure in the rail is potentialy faster. One common denominator, and no I'm not gonna argue about it, that the cars running premium fuel had fewer problems. Weither do to owners differing level of care or gas quality I don't know. There has been twice when I got the dregs form the gas station, and both times the treatment inna can cured things. One other thing that seems to mess things up for what seems to be injector cleaning is when they change fuel brews in cold country, in the fall+summer, and an odd hot cold day hits. The first few brews can leave ya talking to your assitants in foreign tongues. Cheers Bruce I gotta be good or Doc is threating to let the details out about the recliner incident,,,,,........ Cheers Bruce > >:peter > >At 12:25 PM 9/17/98 +0930, you wrote: >>Hello all, >> >>Is there a good way to clean injectors while still fitted to the car? >> >>If not, how do you clean them on the bench without damaging it. >>Ie: chemical or mechanical >> >>Reg >> >>DW >> >> >> > > ------------------------------ From: "Bruce Plecan" Date: Thu, 17 Sep 1998 00:49:43 -0400 Subject: Re: Injector Clean - -----Original Message----- From: ChrisBourk@xxx.com> To: diy_efi@xxx.edu> Date: Thursday, September 17, 1998 12:37 AM Subject: Re: Injector Clean >Does anyone have the number of Summit? (330) 630-0250 >And why is it better than putting in the tank? "Can" be mixed stronger since not exposed to rubber lines as long. Also, more viotile since not exposed to atmos., as long.. Bruce > >Thanks, > >Christopher > ------------------------------ From: "Georg Lerm" Date: Thu, 17 Sep 1998 07:29:52 GMT-2 Subject: Re: Nubie Question Howdy I need a freebe *.eps postscript viewer/editor for efi332. TIA Tom Try a viewer called Ghostview. I use it and works pretty well. You can use to convert to some file formats too. You can find this on the net at:- http://www.eps.ufsc.br/~martins/fuzzy/soft.html You could also scan this link, might find something:- http://physics.hallym.ac.kr/resource/hotlist/graphics.html Georg ------------------------------ From: xxalexx@xxx.com Date: Wed, 16 Sep 1998 12:46:12 +0000 Subject: Re: Lamba sendor readings - advise needed > I have had a problem for the longest time from running too rich. I > connected a digital volt meter to my O2 sensor to get some readings and I > have seem some very strange behavior. Leave the O2 sensor connected to the computer when taking readings, by splicing into the wire, do not disconnect. If you did splice into the wire and got your stated readings then check for broken line. Most cars apply a bias voltage of 0.5V to sensor, to check disconnect O2 sensor wire and turn ignition on, also check any O2 heater wires for voltage. alex ------------------------------ From: Christian Hack Date: Thu, 17 Sep 1998 16:39:29 +1000 Subject: Re: Emulate Just a quick note about this EPROM emulator. It won't let you program in real time. You will be able to sit there with a laptop and upload your new code, start the engine and see what happens. If it doesn't work you will have to stop the engine, modify your code and reupload the whole thing probably (only a few seconds at a decent serial port rate and a smallish PROM - say 16k x 8) If you try to upload to the emulator with the engine running, the emulator will disconnect the SRAM from the emulation port and load in the new code. In the meantime the engine computer will have crashed since it has no code to run and the engine will stall. Even if it was possible to only change one byte at a time, the SRAM would still have to be disconnected for a short while, causing the engine computer crash still. The only hope you would have is if the real time program in the engine computer was able to reset and restart while the flywheel was still turning causing the engine to at least stutter. I know my engine computer was crashing due to a not very long extension cable which brought the PROM connector outside the box. I was getting noise on the cable and the computer was constantly crashing. It idled like s..t and I didn't even dare drive it. Eventhough it crashed it managed to restart in time to keep the engine going (although not very well). BTW: a short length of the good old al foil fixed that problem no worries. If you just want to have a quick change system though (rather than erasing and programming EPROMS) it seems to be pretty good value. - -- Christian Hack christianh@xxx.au > > At 10:40 AM 16/9/98 -0500, you wrote: > >Could these be used to emulate the prom in a 747 ecu? I could actually > >afford one of these! > > > >And the web page had what appeared to be a prom burner that wasn't too > >badly priced. > > > >Joe Boucher > >'70 RS/SS Camaro '81 TBI Suburban > > > >> From: Stuart Bunning > >> Date: Wed, 16 Sep 1998 14:35:59 -1000 > >> Subject: Re: Emulate > >> > >> I don't think so ! > >> are we talking about the samwe em-32 The EM-32 i know of is a 32k > >eprom > >> emulator for more info visit this > >> site below for TCG products in Tiawan > >> > >> http://www.at-taiwan.com/~com00121/ > >> > >> >>>> > >> >>>> Anybody have a clue what a EM-32 Board is?. > >> >>>> If you would e-mail me I'd appreciate it > >> >>>> Bruce nacelp@xxx.net > >> >>>> > >> >>>>A 32 bit Evaluation Module with Electro Magnetic protection > >> >>>>used on some F1 engines. > >> >>>>alex > >> > > - -- Christian Hack christianh@xxx.au EDMI Pty Ltd Ph : (07) 3888 3066 FAX : (07) 3888 3583 ------------------------------ End of DIY_EFI Digest V3 #427 ***************************** 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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