DIY_EFI Digest Tuesday, 5 January 1999 Volume 04 : Number 009 In this issue: RE: Need H_elp with an 89 MPFI 2.8 V6 (Need MAF...) Re: Injector Duty Monitor Re: Water Injection Thread Re: Nology) Re: Water Injection Thread RE: Injector Duty Monitor Old Thread - pulse width Re: Injector Duty Monitor Re: fuel pumps Re: Water Injection Thread Re: Electromotive problems.... Re: Injector Duty Monitor Re: Water Injection Thread Re: Water Injection Thread Re: Injector Duty Monitor Re: Injector Duty Monitor Re: Injector Duty Monitor Off Subject - Gas Grills 1227748 PROM dumps Re: Injector Duty Monitor Re: Injector Duty Monitor Motronic Interface ? RE: Injector Duty Monitor See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: Marc Piccioni Date: Mon, 4 Jan 1999 18:17:57 -0700 Subject: RE: Need H_elp with an 89 MPFI 2.8 V6 (Need MAF...) You maybe experiencing throttle blade icing. If the problem reoccurs remove the air filter and check for ice buildup. In the winter it's usually a good idea to run the stock air cleaner with the hot air pipe going to the exhaust manifold. - ---------- From: Kurek, Larry[SMTP:lkurek@xxx.gov] Sent: January 4, 1999 9:08 AM To: 'diy_efi@xxx.edu' Subject: Need H_elp with an 89 MPFI 2.8 V6 (Need MAF...) Guys: I am having a slight problem with the 2.8 MPFI motor I put in my S10 in place of the old carb motor with the hole in the side of the block :) I was driving home last night and it started cuting out at anything between off idle to about half throttle...kind of like it was running out of gas, but it wasn't since I JUST filled up the tank. The fuel pump is new, and is getting great pressure, so I don't think it is a fuel problem. However...the motor seemed to fix itself and run great again. No SES light either. Once I got home, I decided to check the obvious....coil connectors, wires, etc etc...all seemed fine. However, after a quick test drive, I popped the hood and it almost died out on me.. came back, and set an SES light...code 34, low MAF reading. So, I backprobed the MAF connector and all was OK, I checked for any loose connections and didn't see any either, so i reset the ECM and it seemed OK. Well, on the drive to work this morning, same damn thing. Again, a code 34. One of the causes for this code is a leak between the MAF and the throttle body. I checked this as well, and the only thing that MAY be a problem, is the temperature sensor bung I siliconed into the elbow. The silicone looks to have pulled back just a bit and there may be a SLIGHT opening into the elbow. Could this be enough to cause a problem? I can't emphasize enough how small of a leak this may be. Are these MAF sensors that sensitive? FWIW, I am also running an open element K&N filter, and it has recently gotten quite cold here (Chicago area). Sooo....any ideas? How do I go about testing the MAF itself? Like I mentioned above...the connector checks out fine with +B, ground, and +5v. Does anyone have a spare MAF that they would be willing to part with? This is a three wire MAF out of an 89 Camaro 2.8 V6. It isn't the hot wire variety, but seems to use a thermistor instead? Finally, I did note that the lights on the car dim on occasion for a few seconds at a time. Could this be a bad alternator? Could this cause the problems with the MAF? I'm stretching here guys...I don't want to get stranded in sub-zero temperatures in the middle of nowhere... Thanks! Larry begin 600 WINMAIL.DAT M>)\^(@P!`0:0" `$```````!``$``0>0!@`(````Y 0```````#H``$-@ 0` M`@````(``@`!!) &`& !```!````# ````,``# #````"P`/#@`````"`?\/ M`0```&$`````````@2L?I+ZC$!F=;@#=`0]4`@````!D:7E?969I0&5F:3,S M,BYE;F``,P`0`` M`"(```!D:7E?969I0&5F:3,S,BYE;F5]E9FE 969I,S,R+F5N9RYO M:&EO+7-T871E+F5D=2<``@$+, $````G````4TU44#I$25E?149)0$5&23,S M,BY%3D`' ``0```#0` M``!213H@xxx.965D M($U!1BXN+BD``@%Q``$````6`````;XX23H/!Y&+[J0`$=*^G$1%4U0````` M'@`># $````%````4TU44 `````>`!\,`0```!@```!M<&EC8VEO;FE 871T M8V%N861A+FYE= `#``804.G^$P,`!Q#N!P``'@`($ $```!E````64]534%9 M0D5%6%!%4DE%3D-)3D=42%)/5%1,14),041%24-)3D=)1E1(15!23T),14U2 M14]#0U524U)%34]6151(14%)4D9)3%1%4D%.1$-(14-+1D]224-%0E5)3$15 M4$E.5 `````"`0D0`0`````(``#\!P``I@T``$Q:1G4X^[IR_P`*`0\"%0*H M!>L"@xxx.W M`N0'$P*#-!+,%,5]"H"+",\)V3L7GS(U-0* !PJ!#;$+8&YG,3 S+Q10"PH4 M40OR8P! 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MH#N $%8V("A&0TU!1IHN2/ I*V\L?3&]4NYD=U$[ Z23Q'T+9A(" 1 M@'8=LB601WP';(<\'1W">$*A?]2H!]@)@`>4291`:!:LA& [FP?8AX42/%K"X B4%*A M_2R@:Q[!!4!7DB:!`P!:A?52H6=7H"P*A2-04/%?DSQN)UFA"X C(4?02E7\ M4U0ALAY0(E CH!]S`9#4;FL?,%0?D68*4 ,@_5#0;4;0! !8X ?0-'!94_IS M"H5G$X6""42%><5-!_5AQ8@#0-&$B,A&Q1S)O%_MSDQZQ,SK0 M"H47, ?@2,'G(#$>H!\#4V]Q@GU"'\(_>>6 0G07(B-V0E>23TO_<8$*A2)S M=L*#$R5P%S![H+\=`'0502 &,2(R/]!D8C/O">"%$5# M35E';%2$`!\P5WU&L&PT<'QQ'X)Y$R9"=_\%L'*R96$$8 2@';%H$7T"WF1- M@%'&6U,?,$%N@F7!_W0!?S-P$E*'4U E$ >1(M+_C/-_$VES)[$BL%N\@B8B M,O=CXQX'!'!Y'S&$MXSS5Z'_6^"+8I1F`B E85M3CF=:\?U(P%E;H26!'\4T M<&5A8^/_$^ =04%P-#%L,0" !;$C4/\=P4?0`) LH'011F$D82GS=75V; ;@ M=V1DG&:%LFMOFF$F8$VQ'Z%U8V-]0B#V:BJ2)9!B>T*4=)M1',&#F6,*A5-, M24=(8R#_>; )\!VRG0:=Y@xxx. !P8D&: MT1& `)!ZI&$3T'0!4R&ATRB^0T$04U EL"%P9T$I'S"_ M23R!$"7 1 M6R'_GO*?PTXA"K&"1)CC'X$EA=-+W@#-@=4=$0TV "L F8$?TOQ\Q:5)HI"B4=-(*A78*P/D(D'1Y M-'!ADFQ"GW.FI'UOTFT$`%!R"X 3P1Z@/_U)/$8+@"5"<8,F`%C@+P'_PG=O M1+V!(_1347O1("!\ MH/][82'QSG!0<:=PI0FFA&M(WQ_%EM$H-DC!IW$G(" 3P.\7H'506V.ATV=, M04CQ:&;_5Y"PH2919K&L9MG@xxx.)2 MH:7P=Z'22/'G23QD@&0Q`#T``0`` /``4```!213H@`````'E0 ` end ------------------------------ From: Christian Hack Date: Tue, 5 Jan 1999 11:49:50 +1000 Subject: Re: Injector Duty Monitor For those who can't view the pwmeter.ps file i've put a GIF of the schematic in /incoming for everyone ftp://efi332.eng.ohio-state.edu/incoming/pwmeter.gif It's pretty big though. If that still causes probs let me know and I'll try some other tricks. The main problem is that it will difficult to read the text if I decrease the resolution too much. A decent GIF viewer should let you scale and view it yourself. Christian Hack christianh@xxx.au EDMI Pty Ltd Ph : (07) 3888 3066 FAX : (07) 3888 3583 ------------------------------ From: cosmic.ray@xxx.com (Raymond C Drouillard) Date: Mon, 4 Jan 1999 21:47:06 -0500 Subject: Re: Water Injection Thread On Mon, 4 Jan 1999 11:05:28 -0500 "Gary Derian" writes: >I think we agree about flywheel effects. My point is that a heavy flywheel >will smooth out engine torque variation when the clutch is engaged but can >increase shock loads when starting out, a two edged sword. My >preference is >to have as light a flywheel as I can stand for driveability. > >Gary Derian An engine with more cylinders will have a smoother output torque. V8s tend to be smooth. V12s are even smoother (though I have to admit that I don't know this by experience - yet). Ray ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866] ------------------------------ From: cosmic.ray@xxx.com (Raymond C Drouillard) Date: Mon, 4 Jan 1999 21:43:53 -0500 Subject: Re: Nology) >Because an LCD panel does not consitute a legal number plate. If you get >pulled over for anything, I'm sure it wouldn't be too hard to work out >something funny is happening. I very much doubt an LCD panel showing the >numbers would be convincing. Also the welding mask LCD panels turn opaque >entirely. You would need to obtain an LCD panel that has individual >sections in it to make up the differnet numbers and letters. >In Australia you are allowed to have clear plastic number plate covers, >hence an LCD panel can be made to look like one of those. > >Cheers, Mos. How clear does it have to be? Could it be designed similar to a HUD, or perhaps have diffraction grating etched in? It would be close to invisible to the naked eye. Better yet, how about etching or molding a very small corner reflector pattern into the side closest to the plate? This would cause a glare to be reflected back at any strong light source (flash). Standard reflectors, such as you see on bicycles, next to the freeway, and on the back of cars use a corner reflector pattern. That's what the triangular pyramid pattern is for. Totally passive - how's that for elegant? Ray Drouillard ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866] ------------------------------ From: cosmic.ray@xxx.com (Raymond C Drouillard) Date: Mon, 4 Jan 1999 21:16:09 -0500 Subject: Re: Water Injection Thread >AWD is really great for low traction conditions and year-round driving. >Rear wheel drive with a mid engine and sticky tires should be nearly as good >on dry pavement with way less complexity. How and where do you drive? If that's the case, why does the Lambroghini use AWD? AWD is useful when traction is a problem. This could mean moderate speeds with a slippery surface, or high speeds and lateral acceleration on a sticky surface. It's just another way to have a bigger performance envelope to push. The main advantage of a mid engine is that the mass is near the center of rotation when the vehicle is going around a corner. This makes it more maneuverable. It also makes it easier to spin out. Performance comes with a price :) Yes, it helps the designer achieve 50/50 weight distribution, but there are other ways of doing it. The Corvette engineers did it by putting the engine in the front and the transmission in the back. Another advantage of AWD is that all four wheels are pulling right from the start. With a 50/50 weight distribution, you will have twice the ability to apply force to the pavement from a dead stop. I know that accelerating adds down force to the back wheels and removes it from the front wheels, but AWD allows a forward force equal to the weight of the car * the coefficient of friction, rather than some fraction of the weight * the CF. I know that dragsters are RWD, but that is a specialized application. Typically, the front wheels bear very little weight or lift right off the ground. Also, some of the acceleration force is used to add downward force to the rear wheels. Draw a vector diagram sometime if you have a hard time imagining this :) ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866] ------------------------------ From: Jemison Richard Date: Mon, 4 Jan 1999 21:25:39 -0500 Subject: RE: Injector Duty Monitor Thank you, thank you! Rick > -----Original Message----- > From: Christian Hack [SMTP:christianh@xxx.au] > Sent: Monday, January 04, 1999 8:50 PM > To: 'diy_efi@xxx.edu' > Subject: Re: Injector Duty Monitor > > For those who can't view the pwmeter.ps file i've put a GIF of the > schematic in /incoming for everyone > > ftp://efi332.eng.ohio-state.edu/incoming/pwmeter.gif > > It's pretty big though. If that still causes probs let me know and I'll > try some other tricks. The main problem is that it will difficult to read > the text > if I decrease the resolution too much. A decent GIF viewer should let you > scale > and view it yourself. > > Christian Hack > christianh@xxx.au > EDMI Pty Ltd > Ph : (07) 3888 3066 > FAX : (07) 3888 3583 > ------------------------------ From: "West, David" Date: Tue, 5 Jan 1999 12:07:51 +0930 Subject: Old Thread - pulse width Hello all and happy new year. To all the people that had input on the pulse width and broken turbo discussion - thanks. I finally fixed the car - out of the old 4 cylinder and back into the turbo - wahooo I found the problem to be a faulty hot wire flow meter. Unfortunately, I tested the flow meter on the bench and it was within GM Spec at the start of the investigation. This is also why the ECCM didn't flag it as a problem. When I re-visited the flow meter, after checking everything else under the sun, I found the dynamic spec (using vacuum cleaner) to be within spec but on the upper limit. I then sourced a new meter and it fixed the problem after clearing a shit load of fuel out of the exhaust system. I suppose the moral of this story is: 'Just because a component is within spec doesn't mean that it works correctly.' Bye for now David West ------------------------------ From: "Bruce Plecan" Date: Mon, 4 Jan 1999 21:56:29 -0500 Subject: Re: Injector Duty Monitor - -----Original Message----- From: Christian Hack To: 'diy_efi@xxx.edu> Date: Monday, January 04, 1999 8:59 PM Subject: Re: Injector Duty Monitor I really must be losing it, I can't find it. If someone sees it please send it to me, Bruce >For those who can't view the pwmeter.ps file i've put a GIF of the >schematic in /incoming for everyone > >ftp://efi332.eng.ohio-state.edu/incoming/pwmeter.gif > >It's pretty big though. If that still causes probs let me know and I'll >try some other tricks. The main problem is that it will difficult to read the text >if I decrease the resolution too much. A decent GIF viewer should let you scale >and view it yourself. > >Christian Hack >christianh@xxx.au >EDMI Pty Ltd >Ph : (07) 3888 3066 >FAX : (07) 3888 3583 > > ------------------------------ From: "Mike Pilkenton" Date: Mon, 4 Jan 1999 19:01:30 -0800 Subject: Re: fuel pumps Thanks everyone for the leads. Got some research to do at the parts counter. Mike (3.1L V6 Opel GT conversion) ------------------------------ From: Aaron Willis Date: Mon, 04 Jan 1999 19:09:47 -0800 Subject: Re: Water Injection Thread Raymond C Drouillard wrote: > > >AWD is really great for low traction conditions and year-round driving. > >Rear wheel drive with a mid engine and sticky tires should be nearly as > good > >on dry pavement with way less complexity. How and where do you drive? > > If that's the case, why does the Lambroghini use AWD? For all the obvious reasons. Last time I looked at them (little joke ther) AWD was optional though. There are plenty of people who prefer the more direct FEEL and pointability of RWD to the stability and real-world traction of AWD. RWD has the potential for a bit more fun, but AWD is harder to lose control of. All depends on what you want to do with your car. Just my two cents Aaron ICQ # 27386985 ------------------------------ From: Fisystems@xxx.com Date: Mon, 4 Jan 1999 22:15:58 EST Subject: Re: Electromotive problems.... In a message dated 12/30/98 8:23:53 AM Pacific Standard Time, CEIJR@xxx.com writes: << I have encountered intermittent problems with an Electromotive TEC II in a couple of instances. Each time, the ECU has completely lost its place and shut down because of spark wire interference with the pickup lead from the crank trigger. After being sure that installation gives maximum separation, the only problems have been with "low resistance" wires. Best results have been with street rf suppression wires, where the ECU has been rock solid. It is predicted that those won't last as long as some others, but they have worked better than more expensive spiral wound, etc. Charlie Iliff >> Electromotive has a new pickup to correct this problem. Ken ------------------------------ From: John Andrianakis Date: Tue, 05 Jan 1999 05:34:18 +0200 Subject: Re: Injector Duty Monitor Khoo Teck-Khoon wrote: > > I've searched the archives but could not find anything relevant. I am > interested to make my own injector duty monitor..sort of like the > air/fuel ratio..Can this be done? I am not very familiar with > electronics, but I've seen similar products. Therefore, I hope that > anyone of you super geniuses can help me. In Malaysia, I couldn't find > such a product. And to import it in would cost me an arm and leg due to > the import duties. Thank you. > > Regards > tkkhoo@xxx.com > You can find an injector duty cycle monitor with schematic at http://sura1.jlab.org/~bowling/pwmeasure.html Cheers John Andrianakis ------------------------------ From: Tom Sharpe Date: Mon, 04 Jan 1999 21:44:55 -0600 Subject: Re: Water Injection Thread More on preTurbo exhausts... If they are long for pressure leveling, then you have more area to insulate, and more heat loss, therefor, shorter is better and HPC coat everything to keep the heat in. Heat is as important as pressure. If you can provide the dimensions, Mr Ed in Chicago can build them. regards Tom ------------------------------ From: bearbvd@xxx.net (Greg Hermann) Date: Mon, 4 Jan 1999 20:45:05 -0700 Subject: Re: Water Injection Thread > >Yes, it helps the designer achieve 50/50 weight distribution, but there >are other ways of doing it. The Corvette engineers did it by putting the >engine in the front and the transmission in the back. > Hey--all the Corvette guys did was copy. Alfa's "Alfetta" FI cars of the late '40's did that before there even WAS a Corvette--Not to mention the early Pontiac Tempests, with their "rubber band" driveshafts!! ------------------------------ From: Chad Clendening Date: Mon, 04 Jan 1999 22:00:37 +0000 Subject: Re: Injector Duty Monitor What about making a SIMPLE PWM to DC converter for a DMM? I figure this will run about $2.00. Maybee 3 if you have to go to a retail store. Use a 10 volt regulator so the voltage is at a level most people can easily divide in their heads. Invert/ cleanup the PWM signal, using a bipolar setup as a common emitter, the collector of that should have ( near) 0 volts when the PWM is off, and near 10 volts when the PWM is on. Connect this signal to the gates on both the FET's. The drain leads of both fets are connected together in addition to a filter resistor. The source of the N channel is conntected to ground and the source of the P is connected to +10. The other lead of the filter resistor is connected to a filtering capacitor ( this will also be the output of the circuit) and the other side of the resistor is grounded. The output of the circuit should be a 0 to 10 volt signal proportional to the duty cycle x 10. As long as the RC is correct ( big enough) , even a cheap DMM should display the duty cycle OK If this is too confusing I may be able to draw it in magic marker. Chad ------------------------------ From: xxalexx@xxx.com Date: Mon, 4 Jan 1999 23:09:41 +0000 Subject: Re: Injector Duty Monitor > I've searched the archives but could not find anything relevant. I am > interested to make my own injector duty monitor..sort of like the > air/fuel ratio..Can this be done? I am not very familiar with > electronics, but I've seen similar products. Therefore, I hope that > anyone of you super geniuses can help me. In Malaysia, I couldn't find > such a product. And to import it in would cost me an arm and leg due to > the import duties. Thank you. > If intersested in microprocessor, I wrote some intro to PIC C programs to do simple timing, will give 1us resolution, 65 ms range. with rs232 output. search under PIC 101. Place a 500K resistor in series with input. alex ------------------------------ From: xxalexx@xxx.com Date: Mon, 4 Jan 1999 23:37:39 +0000 Subject: Re: Injector Duty Monitor The $99 rad shack scope probe could work. Is made in Germany and sold under a lot of different names. alex > Another thought..............how about an old "surplus" oscilloscope hooked > up to the injector circuit. This would provide a pretty good > visual/graphical representation of duty cycle and phasing? > > Various companies also manufacture "plug-n-play" notebook oriented > automotive oscilloscope modules. > ------------------------------ From: Tom Sharpe Date: Mon, 04 Jan 1999 22:53:18 -0600 Subject: Off Subject - Gas Grills Would one of you Australians find me a source for one of those fabulous Aus. gas grills with the brass burners, cast iron grills, and Jarrah wood trolley carts? I want a three burner unit but there are no dealers in Il. and none that I can find in the US that will do mail order. please reply off list. Thanks in advance Tom Sharpe twsharpe@xxx.com ------------------------------ From: Ludis Langens Date: Mon, 04 Jan 1999 23:24:58 -0800 Subject: 1227748 PROM dumps A while ago Steve Ravet asked for PROM dumps for the 1227748 ECM for the 2.5 L4 engine. I've uploaded 13 to the incoming directory. Two are for the 1228321 ECM which uses the same circuit board as the '7748. The '7748 was originally used with the "R"/"U" and "K" engines. I didn't keep track of what vehicle some of the PROMs came from - they could be any three of these. 1227748 Program code @ $C008 (aka $4008): 72 ($48) ABLT6730.S19 1987 2.0 "K" auto 2000ppm ACMA9517.S19 auto 4000ppm ACMB9524.S19 auto 2000ppm ACMC9528.S19 auto 4000ppm ACMF9538.S19 1987-88 Fiero 2.5 "R" auto 2000ppm ACMH9544.S19 1987-88 Fiero 2.5 "R" stick 2000ppm ADSJ2829.S19 auto 4000ppm Program code: 72 ($48) w/alterations (bug fix?) ALWM6770.S19 1987-88 Fiero 2.5 "R" auto 2000ppm ANAM1667.S19 auto 4000ppm ATBS3453.S19 1987-88 Fiero 2.5 "R" stick 2000ppm Program code: 112 ($70) ATXD7724.S19 1991 2.2 "G" 1228321 Program code: 80 ($50) ARRN7099.S19 1989 2.0 "1" auto 4000ppm ARRP7103.S19 1989 2.0 "1" auto 4000ppm It looks like I've got a good poker hand forming in the ACMs and ARRs. Here's how the transmission and VSS options are selected: Program code 72: $C244 (aka $4244) bit %10000000 : 0 == auto, 1 == stick $C246 (aka $4246) bit %00100000 : 0 == 2000 ppm, 1 == 4000 ppm Program code 80: $C009 (aka $4009) bit %00000001 : 0 == auto, 1 == stick $C009 (aka $4009) bit %00001000 : 0 == 2000 ppm, 1 == 4000 ppm The 2000ppm digital VSS signal (from the instrument cluster) is input on WHITE-23. The 4000ppm AC VSS sensor inputs at BLACK-6. BLACK-13 grounds the other side of the VSS sensor. When using an ECM connected VSS sensor, the ECM outputs a 4000 ppm digital VSS on WHITE-22 and a 2000 ppm digital VSS on WHITE-3. BTW, the 2000 ppm mode is only used in J-bodies (Sunbird, etc.) and P-bodies (Fiero). This means that the ACMB PROM must be from a J-body ('cause it's not on the list for a Fiero.) - -- Ludis Langens ludis (at) cruzers (dot) com Mac, Fiero, & engine controller goodies: http://www.cruzers.com/~ludis/ ------------------------------ From: Orin Eman Date: Tue, 5 Jan 1999 00:59:16 -0800 (PST) Subject: Re: Injector Duty Monitor > What about making a SIMPLE PWM to DC converter for a DMM? I figure this will > run about $2.00. Maybee 3 if you have to go to a retail store. > Use a 10 volt regulator so the voltage is at a level most people can easily > divide in their heads. Forgo the 10V and you could use a 74HC14 - inverts and cleans up the signal nicely. Run it a little over 5V supply (it will take up to 7V according to the Motorola data book) so you get a 0 to 5V output. Use a resistor in series with the input, a few k should be OK. Add a 5V zener if you are paranoid. A filter cap on the input isn't a bad idea either. Use an old 4000 series CMOS chip and you could run it off 10V! Orin. ------------------------------ From: Orin Eman Date: Tue, 5 Jan 1999 01:03:49 -0800 (PST) Subject: Re: Injector Duty Monitor > > I've searched the archives but could not find anything relevant. I am > > interested to make my own injector duty monitor..sort of like the > > air/fuel ratio..Can this be done? I am not very familiar with > > electronics, but I've seen similar products. Therefore, I hope that > > anyone of you super geniuses can help me. In Malaysia, I couldn't find > > such a product. And to import it in would cost me an arm and leg due to > > the import duties. Thank you. > > > If intersested in microprocessor, I wrote some intro to PIC C > programs to do simple timing, will give 1us resolution, 65 ms range. > with rs232 output. search under PIC 101. Place a 500K resistor > in series with input. I have PIC16C84 code for a duty cycle meter - drives a 2 digit multiplexed LED display. I'll upload the code to the ftp site when I get chance. Orin. ------------------------------ From: Putter C Date: Wed, 23 Dec 1998 14:35:10 +0200 Subject: Motronic Interface ? Hi, Has anybody got an idea which protocal is ussed byt the bosch motronic 1.5/2.5 ECUs? The diagnostics port on my car looks nearly like the ALDL ports and not like OBD-II. What is the equivalent to to Vauxhaul Astra (UK) {OPEL Astra (RSA)} in the rest of the world, maybe somebody has go some info on the computer, but published it under another name ? Cheers Carlo Happy holidays to ya all. ------------------------------ From: Putter C Date: Mon, 4 Jan 1999 12:07:06 +0200 Subject: RE: Injector Duty Monitor This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. - ------_=_NextPart_000_01BE388A.57950D30 Content-Type: text/plain Hi Just a correction, the dutycycle of the injectors does not realy mean anything, it is the open time that is normally of interest. The dutycycle however can give you an indication of feul-economy. Cheers Carlo Putter South Africa > -----Original Message----- > From: Stuart Bunning [SMTP:stuart@xxx.au] > Sent: Monday, January 04, 1999 11:09 AM > To: diy_efi@xxx.edu > Subject: Re: Injector Duty Monitor > > > I have not tried but would be interested in the results. > > You can get digital multimeters that have a duty cycle input this should > work and not cost much. > Some multimeters have a dwell for checking ignition dwell/points gap > which > may work for injectors???? > > If anyone has this type of multimeter one could they try it for us.. > > > At 11:38 PM 3/1/99 PST, you wrote: > >I've searched the archives but could not find anything relevant. I am > >interested to make my own injector duty monitor..sort of like the > >air/fuel ratio..Can this be done? I am not very familiar with > >electronics, but I've seen similar products. Therefore, I hope that > >anyone of you super geniuses can help me. In Malaysia, I couldn't find > >such a product. And to import it in would cost me an arm and leg due to > >the import duties. Thank you. > > > >Regards > >tkkhoo@xxx.com > > > >______________________________________________________ > >Get Your Private, Free Email at http://www.hotmail.com > > > > > Best Regards, > > STUART BUNNING > SALES ENGINEER > KENELEC PTY LTD > > 23-25 REDLAND DRIVE > MITCHAM VICTORIA 3132 > AUSTRALIA > > PHONE: 61 3 9873 1022 > FAX: 61 3 9873 0200 > EMAIL: stuart@xxx.au > WEB: http://www.kenelec.com.au/ - ------_=_NextPart_000_01BE388A.57950D30 Content-Type: application/ms-tnef Content-Transfer-Encoding: base64 eJ8+IgYJAQaQCAAEAAAAAAABAAEAAQeQBgAIAAAA5AQAAAAAAADoAAEIgAcAGAAAAElQTS5NaWNy b3NvZnQgTWFpbC5Ob3RlADEIAQWAAwAOAAAAzwcBAAQADAAHAAYAAQD1AAEggAMADgAAAM8HAQAF AAsABAADAAIA8AABCYABACEAAAA0RDdCOUREN0M0OTlEMjExODY5NjAwQTBDOTAxOTUxMQAFBwEE gAEAGgAAAFJFOiBJbmplY3RvciBEdXR5IE1vbml0b3IA/QgBDYAEAAIAAAACAAIAAQOQBgD0CgAA LgAAAAMANgAAAAAAAwAFgAggBgAAAAAAwAAAAAAAAEYAAAAAUoUAALcNAAAeABiACCAGAAAAAADA AAAAAAAARgAAAABUhQAAAQAAAAQAAAA4LjAAAwARgAggBgAAAAAAwAAAAAAAAEYAAAAAAYUAAAAA AAALAACACCAGAAAAAADAAAAAAAAARgAAAAADhQAAAAAAAAsAHIAIIAYAAAAAAMAAAAAAAABGAAAA AA6FAAAAAAAAAwACgAggBgAAAAAAwAAAAAAAAEYAAAAAEIUAAAAAAAADAAiACCAGAAAAAADAAAAA AAAARgAAAAARhQAAAAAAAAMAHoAIIAYAAAAAAMAAAAAAAABGAAAAABiFAAAAAAAAHgAtgAggBgAA AAAAwAAAAAAAAEYAAAAANoUAAAEAAAABAAAAAAAAAB4ALoAIIAYAAAAAAMAAAAAAAABGAAAAADeF AAABAAAAAQAAAAAAAAAeAC+ACCAGAAAAAADAAAAAAAAARgAAAAA4hQAAAQAAAAEAAAAAAAAAAgEJ EAEAAADPBQAAywUAANQIAABMWkZ1tuk1gQMACgByY3BnMTI1djIA9AH3IAKkA+MCAGOCaArAc2V0 MCAHE4cCgwBQD7ZwcnEyELZmfQqACMggOwlvDjA1swKACoF1YwBQCwNjAEFFC2BuDhAwMzMLpiAe SACgCrEKhAqASnVzGQVAYSAFoQlwY3RpAQIgLCB0aGUgZFB1dHljGaBsGVBvdmYZIwuAahixBbAE IGRybweRbm8FQAlwB0B5biAHgAORAHB5GTALgGc6LBdEaQVABAAZI29wbwnwGSAHcRkhYR1jG3By 3QDAbBvhGhELgHQEkAeQEHQuIFQZS2hvd5xldgSQGGADkWdpIZDdF0R5CGAcURpxZA3gHrCDGOEa AmZldWwtBZHRG3BteS4XSkMZQASQzxAAJUQKwAkAIFAZgB/x/RdEUwhgGTAQsANQI1EXSuEK9Gxp MzYBQBXQAUAPEgAbgBixEUQxNiAt7SryTwUQIhBuB0AF0AeQ8HNhZ2Uq8xdGKgQp0YMLEyoGaS0x NDQBQHEpUDE4MAFADNAuk2JUIEYDYToMg2IQoFOMdHUKwAVAQnVuAwABFjAgW1NNVFA6UxggMNJA awnwZRngY4IuBaBtLmF1XRdFLy/ABmACMDAnTQIgZGE6eRkQSgBwMNEb8DA0GRkQMTk2EDXwMTow yTYwQU0zZ1RvMCcjQGR5XwEQaUA4URZwMiIuCfBnLm8coG8tOxggHrBlOPAZcDNodWKDGqIwJ1Jl OiBJGpX8IEQZgTSyHVAFsCyfLarXKVQLthdZSSFAYSGQG2MidAiBZCBiGYAgd/0IYGxBkRpiH/RB gQuAGSPTIBEkIHRzJMtZIsEh098QgDgBIhABkAMgbUPRB3H/H/Edkh6xQMMYUBlyGGAZw90LgHBB wRyRBCBzIVBCEfMXREHwcmscUUGQG3IFoP8YIUYgEDAkxSdwHmFGKkc2PyFwH2Aj8AWxGGAZQGNr HzFiK2A88SOSTRMvcG/jH9EEIGdhcEHgHKAQML8XRADAG/BJw01yGoc/UgHfP+saIBxhAiAhMWEd kh2C/nkeABoCRigaAFNxBaBCEn8ZMRvwQVAb8B1RTXIYEC6bJMsXREEFQDZRMzgmoEBNIDMvMS82 IVDsU1QZECKydyoCMCAXU/g+SSdA4RBwCsBNwVXj/xhAW3EiIQQgQbJVpBtyLmDvSiEcZhuhGeB2 AHAgQUCgfGFtCuNawUKJGtAcAGH3MnAcAB+BdyMCPBVHowRg+zzzVyBzCREaAilQYMEZMmNahQtw ci9mClADIHL/I3JXICZQQ0IdgUJRGyAykN4/XvQbciGRG/BmXyADEP8HMAXAA/AnoVqFMqJBUDzh /GNzGRBBslr1HhEAkGdx/wrBKfEZcBjARAAgYglwTXH+ZRkQQKEd8R6EY+ZTRBoR/yKyQ8AeAAXA LCADABgQB5F7IdIZQGxP0AeAXuEDoE03B0A1AACQYWwCVaNuJ39dZVqFQ8AQMBhBatUgUEH/SiFg cQdwT0Aw8R1SA6BB9P9KlEdhHEEfMEoDGeAxgBlw/x5xJpBahRpDc7QZcQiQa0PvAHBJ8CKxJMU+ WoU7sE+wJwsgJeV3EGtrIVBvQL0hUHQAwAMQMuJ4/F98v+99z37ffwBahUdFcUThBcB+UAUQXqAf 8BkQL+AJ4CD+RXtSGEAFQRXSJCAhQAJAoHA6Ly93g3AueyrfKbIkID/VeVUXSkIgITuhB3nzHOUn FVRVQVJUgTEQVU5OSU5HJxVoQUxFBfBFiMCIsEVURVIXREuJoEWJYEOBJqBUWSBMVEQXShgyMy0O MAfwRURMCEFORDxwUklWRUEXRE1JVENINrAgoFZJQ1RPjSBBWRDWMTjQWAVVWaBSiVCOoDEXSlBI T4ngO9AgNsIxWRAgOTg3kXAWUOIyjwVGQViREZEqkfCDLyEXU0VNQUlMkRHHMg8zEhdEV0VCkrOC j1uDkDJ8L4RsEsEAmjAAAwAmAAAAAAADAC4AAAAAAAsAAgABAAAAHgBwAAEAAAAaAAAAUkU6IElu amVjdG9yIER1dHkgTW9uaXRvcgAAAAIBcQABAAAAFgAAAAG+N8ux3k4fp9ejrhHSvkgAAOguERoA AEAAOQAgv+/7yTe+AQMA8T8JBAAAHgAxQAEAAAAHAAAAQ0FSTE9QAAADABpAAAAAAB4AMEABAAAA BwAAAENBUkxPUAAAAwAZQAAAAAADAP0/5AQAAAMAgBD/////AgFHAAEAAAAqAAAAYz1aQTthPSA7 cD1TdW47bD1JTkdXRUItOTkwMTA0MTAwNzA2Wi0xMDcAAAACAfk/AQAAAEsAAAAAAAAA3KdAyMBC EBq0uQgAKy/hggEAAAAAAAAAL089U1VOL09VPUlORy9DTj1SRUNJUElFTlRTL0NOPVVTRVJTL0NO PUNBUkxPUAAAHgD4PwEAAAAJAAAAUHV0dGVyIEMAAAAAHgA4QAEAAAAHAAAAQ0FSTE9QAAACAfs/ AQAAAEsAAAAAAAAA3KdAyMBCEBq0uQgAKy/hggEAAAAAAAAAL089U1VOL09VPUlORy9DTj1SRUNJ UElFTlRTL0NOPVVTRVJTL0NOPUNBUkxPUAAAHgD6PwEAAAAJAAAAUHV0dGVyIEMAAAAAHgA5QAEA AAAHAAAAQ0FSTE9QAABAAAcwoHjmrsk3vgFAAAgwMA2VV4o4vgEeAD0AAQAAAAUAAABSRTogAAAA AB4AHQ4BAAAAFgAAAEluamVjdG9yIER1dHkgTW9uaXRvcgAAAB4ANRABAAAAPgAAADw3MTE4Nzgw MDg1RjhEMTExODY3MjAwQTBDOTAxOTUxMTBBRTY4M0Bpbmd3ZWIuaW5nLnN1bi5hYy56YT4AAAAL ACkAAAAAAAsAIwAAAAAAAwAGEOKo/UUDAAcQ2QQAAAMAEBAAAAAAAwAREAAAAAAeAAgQAQAAAGUA AABISUpVU1RBQ09SUkVDVElPTixUSEVEVVRZQ1lDTEVPRlRIRUlOSkVDVE9SU0RPRVNOT1RSRUFM WU1FQU5BTllUSElORyxJVElTVEhFT1BFTlRJTUVUSEFUSVNOT1JNQUxMWU9GAAAAAAIBfwABAAAA PgAAADw3MTE4NzgwMDg1RjhEMTExODY3MjAwQTBDOTAxOTUxMTBBRTY4M0Bpbmd3ZWIuaW5nLnN1 bi5hYy56YT4AAADywA== - ------_=_NextPart_000_01BE388A.57950D30-- ------------------------------ End of DIY_EFI Digest V4 #9 *************************** 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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