zacward Posted September 30, 2015 Share Posted September 30, 2015 (edited) Finished my MS1 3.57 install but have a few issues. 280z, just figure everything stock except 420cc injectors. 1. Tunerstudio and the MS ecu lose comm during cranking. The main relay has power during cranking, maybe down to 10 or 11v but still good power. 2. No tach signal. Pin 24 (white) goes straight to coil negative JP1 is jumpered 2-3, J1 is jumpered 3-4 Would anyone recommend using one of these to isolate a good signal? http://www.summitracing.com/parts/msd-8910/media/instructions3. Would I have better luck taking the tach signal from the oem ignition control unit?When cranking and watching multimeter on the neg side of blaster 2 coil its spitting out all kinds of voltages, 12v, 8v, 10v,14v...Everything ran fine with the carb, ignition has not been touched.And why am I not permitted to upload my msq tune or logs to here? Edited September 30, 2015 by zacward Quote Link to comment Share on other sites More sharing options...
Metro Posted October 1, 2015 Share Posted October 1, 2015 So it sounds like you've connected MS to the coil's negative post. While MS can work that way, it's an antiquated method. Sounds like you might have configured the input incorrectly too. V3.57 Opto-isolator (for coil negative fuel-only triggering):a ) Find JP1 in the bottom right of the board. Place a jumper across positions 2 and 3b ) Find J1 in the middle of the board. Place a jumper across positions 1 and 2c ) Place a jumper from XG1 to XG2 (just to the left of J1 above U3.) In exceptionally noisy situations it might be required to remove that jumper and instead runs XG1 out through a spare connection on the DB37 and through the loom direct to the engine. With a 280z, you can directly connect the VR sensor in the distributor to MS. One wire (either red or green, I can't recall) to pin 24 and the other to a ground pin on the ECU. Then configure the jumpers for a VR input. If the coil VE method is still causing the ECU to reset, I would recommend going this way. Quote Link to comment Share on other sites More sharing options...
zacward Posted October 1, 2015 Author Share Posted October 1, 2015 I got it, MEGA Z is running. Had to pull tach input from the blue wire on the OEM ignition module for my pin 24. The MSD blaster2 coil sends a dirty, dirty signal.While I do still lose comm when cranking, the MS unit stays powered. I vaguely remember that some installs have that problem but cant remember the fix. Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted October 2, 2015 Share Posted October 2, 2015 While I do still lose comm when cranking, the MS unit stays powered. I vaguely remember that some installs have that problem but cant remember the fix. Are you using a USB adapter? If so, what sort? Quote Link to comment Share on other sites More sharing options...
SHADY280 Posted October 9, 2015 Share Posted October 9, 2015 I found using an adapter and a USB cable and 9 pin serial cable was a terrible combo. I removed the USB cable and it solved my problem completely. Quote Link to comment Share on other sites More sharing options...
zacward Posted October 23, 2015 Author Share Posted October 23, 2015 Matt, using the diyautotune adapter with a 6ft usb cable (good quality, got from ALTEX electronics) Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted October 26, 2015 Share Posted October 26, 2015 6 feet of USB wire is going to act like an antenna to pick up any noise in the installation. Better to use a USB adapter that plugs straight into the computer and make ALL the wire RS232. Quote Link to comment Share on other sites More sharing options...
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