Wide260z Posted October 26, 2006 Share Posted October 26, 2006 I'm in the process of trouble shooting my 280zxt swap. I am starting to confuse my self and was hopeing someone could help out a little. Does the factory ecu need a tach signal in order to run the injectors or does it use the crank angle sensor? I am using an msd that i had on my old motor in which the distributor as a 240, single points. Do i hook the white wire from the msd to the same spot on the 280 distributor, male connector on the side, given that it doesn't have points? This is what is happening and why i am asking these silly questions. I took a spark plug out and noticed it wasn't even damp from turning it over for a few min straight trying different things. Also notice it was not getting spark to the plug when i turned the motor over. The msd has a good direct ground and has power both on the main 12v and the ign wire. Kris~ Quote Link to comment Share on other sites More sharing options...
turbobluestreak Posted October 26, 2006 Share Posted October 26, 2006 ecu does not need tach signal for injectors but I think the ecu sends a signal out to the trigger to fire the coil on the negative side. What year is the harness and all post a wire diagram. tbs Quote Link to comment Share on other sites More sharing options...
Wide260z Posted October 27, 2006 Author Share Posted October 27, 2006 It is an 82. So the ECU send the tach signal not the distributor? Possible reason i am not getting any fire DAMN IT! should have stayed 240 motor with the webbers... not. Quote Link to comment Share on other sites More sharing options...
Wide260z Posted October 27, 2006 Author Share Posted October 27, 2006 I also could use any more wiring on the 82 ecu. I do not think i have the power wires correct. Quote Link to comment Share on other sites More sharing options...
turbobluestreak Posted October 27, 2006 Share Posted October 27, 2006 No the computer fires to the coil. For the 82 wiring go to http://carfiche.com/manuals020/cars/ and when the 82 280zx is available download it. It’s in PDF format and everything is there that you'll need. tbs Quote Link to comment Share on other sites More sharing options...
Wide260z Posted October 28, 2006 Author Share Posted October 28, 2006 From the Electrical System inspection EFI circute diagram shows a little different from the haynes manuel diagrams that are also in that same pdf. I went to pin 18 ( - ign coil) and checked for any voltage and there was absolutely no change in anything when the key was on or starting. I've used the same diagram for 12v constant, efi relay, and start. For some reason still not getting any signal out for the coil. Edit: Can i get a signal for the MSD w/o the "Power Transistor" that is used with a standard coil setup? Quote Link to comment Share on other sites More sharing options...
znova Posted June 24, 2007 Share Posted June 24, 2007 Wide260z: Did you ever get the coil to fire without the use of the power transistor? I think my power transistor just bit the dust. Quote Link to comment Share on other sites More sharing options...
JessZ Posted June 24, 2007 Share Posted June 24, 2007 Not sure if this will help, but it's what goofed me when I did my swap. Make sure the backside of the ignitor, which is attached to your coil bracket is firmly grounded to bare metal on your fender. You may have to sand down some paint. Quote Link to comment Share on other sites More sharing options...
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