skirkland1980 Posted August 27, 2010 Share Posted August 27, 2010 hello, been a member a while, this is my first post. i just built a megasquirt1 V2.2 for my 83 280zx turbo. i would like to explain some trouble that i had and what i did to fix it. i had no problem assembling the board or stimulator. the problem that i had was firing the coil. I used the schematics provided here http://forums.hybridz.org/index.php?showtopic=23244 which worked well for triggering MSnS but there was a problem with firing the coil. First thing i had to do was download the latest firmware to my cpu. Instructions for that can be found @ diyautotune.com. You also need to download megatune to set everything up on your MSnS. Set up your engine constants which are self explanatory. Some things that are not are: (in codebase and outputs function) FIDLE needs to be set to "Spark A". LED17/D14: need to be set to "squirt", (in Spark) dwell setting: need to be "fixed duty and minimal for HEI" Also spark output inverted: "NO" Some mods to make to the board are as follows: to trigger MSnS. Look at your board with the DB37 on the right and DB9 on your left. Find R29 (on the far right) there is a hole to the right of R29, then find X13 & X12 and there is a hole to the right of X13 & X12. Place your 1K ohm resistor across those holes and solder it in. That is your pull-up resistor for the distributor input signal. Now for the output: cut out transistor Q5 and solder the lower two pins together. Dont bother wiring in a pull-up 5V resistor on the FIDLE circuit but do wire up the HEI module as shown in http://forums.hybridz.org/index.php?showtopic=23244. The schematic does not show the necessary 12V to the coil +. Also the TPS wiring is, BLACK: ground, RED: Vref, White: signal. Hope this helps! Quote Link to comment Share on other sites More sharing options...
FlatBlack Posted August 27, 2010 Share Posted August 27, 2010 (edited) Hey there, just FYI we have a "MegaSquirt" subforum under Engine Components>EMS>MegaSquirt. http://forums.hybridz.org/index.php/forum/34-megasquirt/ You can't see it from the main page, yet another thing to make the new site more confusing for the new guys Unfortunately I have no idea how the 2.2 boards work so I can't help you :/ Edited August 27, 2010 by FlatBlack Quote Link to comment Share on other sites More sharing options...
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