tech9 Posted July 15, 2009 Share Posted July 15, 2009 Going to swap over to my n42 intake, with my 440 injectors on my NA engine now, just to test waters for the new engine install. I got MS 2 board, and currently running 280zx dissy (non turbo) Eventually, i'm going to try and get COP / VR crank sensor/ IAC etc going. My question is, can I run no O2, and no IAC for now? Trying to just do 1 thing at a time, and work up to more things later. I have the MS2 built, and have it setup for VR right now, was planning on running the 280zx dissy for now, I have a 81 turbo dissy, but I guess it will be even more work to switch? Other then the TSP hookup / IAT / CLT, what else would I need to get this going? I built the board a few months back, and man did I forget a lot! Any help appreciated! Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted July 15, 2009 Share Posted July 15, 2009 MS will work without either an IAC or an O2 sensor. Tuning without O2 feedback is a pain... but even if you do have an AFR gauge, it doesn't need to talk to the MS for it to run. Quote Link to comment Share on other sites More sharing options...
tech9 Posted August 28, 2009 Author Share Posted August 28, 2009 Matt, this post might be right up your alley, Almost ready to get the COP using vr crank sensor (derek's setup seems like it will work awesome!) I'm using LS2 coils, which are +5v pullup (I think, hopefully) so it needs the 2N4033 transistor instead of ground switching which just uses a 1k resisitor for the Spark A,B,C correct? I used the info on this page: http://www.msextra.com/ms2extra/MS2-Extra_Ignition.htm#5Vpull I'm assuming that you build Spark A circuit going to "IGN / pin 36" from top of R26 Spark B going to SPR4 / pin 6 from top of R29 Spark C going to SPR2 / pin 4 from top of R27 No need for spark D Are there any other mods needed to the board for this to work? I have done the VR input mods already. Also with these outputs, it will not interfere with my IAC / fan programmed output correct? Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted August 28, 2009 Share Posted August 28, 2009 Either one can work - I've used "ground switched" mods with LSx coils before. Quote Link to comment Share on other sites More sharing options...
tech9 Posted August 28, 2009 Author Share Posted August 28, 2009 Ahh, so you mean hook up the +5v to the coil constant, and use ground switching to "fire" it? or the other way around, which is more complicated of course? I read a lot of conflicting info, on how LS1/LS2 coils are different, blah blah. I think I got it straight now. Quote Link to comment Share on other sites More sharing options...
tech9 Posted August 28, 2009 Author Share Posted August 28, 2009 Also conflicting info here: http://www.msextra.com/ms2extra/MS2-Extra_LS1.htm http://www.msextra.com/ms2extra/MS2-Extra_Ignition.htm#groundpull I modded my MS already using the 2nd link, where you go from R29/R27 not the LEDs directly, and also a 1k resistor not 4k7. Blah! Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted August 31, 2009 Share Posted August 31, 2009 Different coils seem to need different resistors, but I've used 1K's with LS1s with no trouble. Quote Link to comment Share on other sites More sharing options...
tech9 Posted September 9, 2009 Author Share Posted September 9, 2009 A quick MS question that I can't find an answer to. I have 440cc supra injectors, how can I tell which is the negative or pos wire? Or does it not matter? Thanks! Quote Link to comment Share on other sites More sharing options...
Derek Posted September 9, 2009 Share Posted September 9, 2009 A quick MS question that I can't find an answer to. I have 440cc supra injectors, how can I tell which is the negative or pos wire? Or does it not matter? Thanks! On my Bosch injectors it doesn't matter. Derek Quote Link to comment Share on other sites More sharing options...
naviathan Posted September 9, 2009 Share Posted September 9, 2009 Typically (if I remember correctly) the injectors will have an indicator on one side for the positive. I think on my 370cc injectors the positive is the pin on the right when looking at the socket on the injector. Which I believe was opposite of the red/black wires in the replacement connectors from DIY Auto Tune. Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted September 9, 2009 Share Posted September 9, 2009 A quick MS question that I can't find an answer to. I have 440cc supra injectors, how can I tell which is the negative or pos wire? Or does it not matter? Thanks! I'm running these in my Dart... and they can be wired either way. Quote Link to comment Share on other sites More sharing options...
tech9 Posted September 10, 2009 Author Share Posted September 10, 2009 Thanks for the info guys. Here is my modded ms board, with a shot of my starting my wiring in the bay. I did +5v pullup, which was a little more complicated then ground switching, so we will see if it works out for me. Notice the absence of the dissy!!! Quote Link to comment Share on other sites More sharing options...
tech9 Posted September 24, 2009 Author Share Posted September 24, 2009 Any help on which coils / injectors to fire in batch? I have Spark A B C, and i'm thinking just doing 1-4 2-5 3-6? The injectors I did the same way, except 1-3-5 2-4-6 style? Quote Link to comment Share on other sites More sharing options...
softopz Posted September 24, 2009 Share Posted September 24, 2009 here you go http://forums.hybridz.org/showthread.php?t=152178 Quote Link to comment Share on other sites More sharing options...
tech9 Posted September 27, 2009 Author Share Posted September 27, 2009 Had some major issues today with no RPM signal from Vr sensor, fixed it (bad solder joint apparently) and were back in business. COP wire time now. It looks as if noone has done this yet, hope its as easy as it looks. Quote Link to comment Share on other sites More sharing options...
tech9 Posted September 28, 2009 Author Share Posted September 28, 2009 Here is the first spark from 1 plug at least. It was very interesting wiring the coils, I installed the caps that are recommended which made the difficulty go way up. Hopefully I can finish all the coils tomorrow and get the fuel system working. Quote Link to comment Share on other sites More sharing options...
tech9 Posted September 28, 2009 Author Share Posted September 28, 2009 When moving MS to its location (under passenger seat) there is so much noise on the RPM signal that it does not even spark correctly and just resets a ton. I'm thinking the Spark A B C need to be separate from the VR sensor signal, or both separate from everything else. Other then that, it works great! Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted September 29, 2009 Share Posted September 29, 2009 One other tip - try isolating the case from the chassis. Quote Link to comment Share on other sites More sharing options...
tech9 Posted September 29, 2009 Author Share Posted September 29, 2009 Its on a piece of compressed wood, and so is the relay. I found its the spark ABC that is causing the issues, as they were running along the power wires for MS, when I moved them it only resets once in a great while, maybe if I jacket those wires we will have it solved. Also, is it safe to run the fuel pump using the "FP wire" from the relay board? Or should I run a separate power wire from the battery with a relay? Quote Link to comment Share on other sites More sharing options...
blackwidow Posted October 5, 2009 Share Posted October 5, 2009 If it was me I would go from the battery. Quote Link to comment Share on other sites More sharing options...
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