Hey everybody, fear not, I haven't forgot about you or this build. We bought our first house in August and that kind of derailed the car build, but here we go, time to get back to it!
Now that the car is reliably running it is time to tear into the WRX engine wiring harness, This may look pretty tidy but in reality there is about 10 extra feet of harness wrapped around in here, time to get out the wire cutters and shorten it to fit!
Click to view attachment I started with the brown main plug in the engine harness, this holds the power and trigger wires for the injectors and coils, as well as a series of ground wires from the ecu. I shortened it by about 10' and soldered and shrink wrapped the connections.
Click to view attachmentI wanted to wait to do this until the engine ran so i could start up the engine and check the codes as I modified the harness be able to catch a problem as i did it rather than after cutting literally every wire that controls the engine. I finished the Brown plug, it fired up well, no extra codes, here is how much extra wire I am dealing with here. Next I shortened the black plug's wires, these hold the sensor leads and grounds. There is an extra gray plug as well that has the cam and crank sensor wires that I merged into unused spots in the black plug so now I only have 2 main plugs leading to the engine.
Click to view attachmentI also removed the stock WRX fuel and ignition relays and replaced them with a new relay panel I fabbed up. These power the two main ignition circuits for the engine as well as the fuel pump.
Click to view attachmentHere is a view of how it is shaping up from the top.
Click to view attachment