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fedede10 Posted - Apr 16 2011 : 11:50:13 AM
Well i have a very basic knowledge when it comes to electrical work, so when installing my lt8s on my 88 rx7 i have come to a couple of problems
-I am running 3 MSD 6AL boxes, but I dont know how to connect from the ems to them and onto the 4 blaster ss coils. Do i still have to run the stock igniters?
-how to wire my fuel pump (its a bosch 044 internal). And if it already has a relay and does it have to be replaced?


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Aaron Cake Posted - Apr 23 2011 : 10:19:51 AM
I always just pull the signal from the trailing coil. It's the black/yellow wire. Or, just pull it directly from the key switch at the steering column. Black/white I believe but check with a meter to be sure.

The wiring diagrams for the stock wiring are in the Haynes manual at at the back of the FSM.
fedede10 Posted - Apr 17 2011 : 10:33:28 AM
Sorry to be a pain, but last night im trying to wire the on position from the key and i couldn't find which wire feeds signal to the original ECU to adapt it to the LT8s
Aaron Cake Posted - Apr 17 2011 : 10:24:05 AM
You would need to connect your MSD boxes between the stock ignitor and coil. They won't really be much good though as the stock ignitors do the job fine. I'd recommend just putting an MSD box on the leading and then selling the two you have for the trailing.

Here is the wiring diagram for the LT8X from the Microtech site:
http://www.microtechefi.com/pdf/LTX8MAZDA13BT.pdf

Fuel pump wiring on the LT8X is the same as on the LT8s. You'll run new wires from your ECU wiring panel back to the fuel pump (12 guage) and then use a relay at the ECU wiring panel to switch the fuel pump (wired as per the diagram).

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