On our current harness for standard MegaSquirts, the MS trigger wire is the white wire in the shielded tach input, and the black wire in the shielded tach input is a ground. MS Trigger (to Pin 24 on DB37, or Relay Board TACH terminal) Thanks to Chris Lupkin for permission to use this drawing Distributor Wire Colors in the OEM Wiring HarnessĬolors of the wires on the distributor side of the 4 pin round connector, versus on the harness side.
This diagram assumes you are splicing the connector from the OEM Nissan wiring – color designations are for the Nissan wiring harness, not the MegaSquirt wiring.Īnd alternately, here’s a diagram for how to wire up the relay board if you choose to use it: Here’s a diagram of how to wire it all up if you’re laying out your own wiring harness. The input side of things will be the same as mobythevan’s setup– it’s the output side of things that will change. You will need to change the spark output pin from JS10 to D14. Note – if using MS2/Extra, you can also build the board as shown in the MS1 example.
You can use an MS3 with the MS2 mods shown here, although to take full advantage of the MS3’s capabilities, it is better to use our L28ET trigger disc upgrade to allow sequential injection. It’s choice time, MS1 with MS1/Extra firmware, MS2, or MS3. It needs slightly different mods and settings see this article for how to set it up. Note – want to trigger a distributorless ignition or sequential injection from the stock distributor? We now offer a bolt in trigger disc that gives you that option. There is already a great write-up by ‘mobythevan’ at on how to MegaSquirt the 280zx turbo using the MegaSquirt-I PCB2.2 ECU, combined with an HEI-4 module, but what about the more recently released PCB3 ECU? Certainly you could use it the exact same way and follow the same document combining the MS with the HEI-4 module and end up with the same result, but what about that snazzy new IGBT High Current Ignition Coil Driver that’s built into the PCBv3.0 ECU? I was recently contacted by a customer that wanted to try and go this route, and I told him I’d make the necessary modifications and document the process for others to follow… so here we go! Level of control: Full Standalone EMS– Fuel and Ignition Control These same modifications work for the ’84-’89 300ZX, both turbo and non turbo. Directly driving the coil with the MegaSquirt-I PCB 3.0 and MSnS-E 024s9 or later or the MegaSquirt-IIĪpplication: 1982-1983 280ZX Turbo, or conversions using the 82-83 turbo distributor