Engine swap

[illspen]

Mostly I want to check to see if I'm doing my swap right, and I need some clarification on a few wires, I know this might be a bit redundant but I haven't had any luck finding it online.. So..

 

I followed numbachuck's (spelling) guide the best I could, this is what I have..

 

86 subaru brat, ej22 engine and keeping the brat manual transmission, harness was done by SJR.

Also got a complete wire diagram from a vender online.

 

Ok, I have the speed, tach, oil pressure, coolant temp, going to the dash display, I have the "hot at all times" going to the battery with a 15 amp fuse on it.

 

Now the things I don't understand,

 

1. Starter wire, the ecu has a 18 gauge, and the starter wire from the brat side is a 10, is it ok to splice them together?

 

2. I can't find the check engine light wire, the wire diagram says its blue/red, with a black/white (ground?)

But I can't find a blue/red wire on the white round plug terminal.

 

3.i have a few wires labeled "hot fused" should I also have these on the wire coming from the battery, is the fuse size the same?

 

4. One for "hot run and start" I just don't know where to put this...

 

I think I have a handle on everything else, I didn't dismantle the car, but bought it in boxes, unlabeled and unorganized, so guessing where parts go, and having parts that I have no idea where they came from has been a challenge, but I thing this Brat is getting close to being driven.

[Gloyale]

1. Yes ok to splice.  Just piggy onto the starter solenoid terminal.

 

2. CEL you will likely have to add a pin in the harness.  Trace the ECS light circuit path on the board to the connector......IIRC pin 2 or 8???  1 in from the ends but check yourself its easy to follow.  The light will have 12v+ to it already and the wire from teh EJ22 ECU is the ground to light it up.

 

3.  These wires will be Battery hot at all times.  20 amp fuse should be sufficent.

 

4. These go to the IG. switched power.  I use the factory Fuel pump relay connector to tap in so it's already fused.  but you can use the Ig. switch wires and add a fuse or go to the fusebox and use the EGI fuse (10 amp)

 

I have to ask......Where did you tap Speedo wire?  and for Temp and oil the EJ has a switch that will peg the gauge to teh top at 0 pressure, and drop the needle to nothing when the oil is pumping above 2 psi......kinda reversed think of it as a light rather than a gauge.  Temp wire add a 270 ohm reistor in parallel to the sender to a ground on the intake to correct the temp reading scale.

 

Tach (yellow wire)can also be accessed easily at the old Fuel pump connector, as well also you can tap the Fuel pump power wire there too so you dont have to run new wires bakc to the pump.

[illspen]

On the wire diagram, it says the speed wire is yellow/red strip, on the round black multi terminal, if you would like I can post the wire diagram. ( I am guessing it's the black multi terminal, cause it's the only yellow/red wire.

[Gloyale]

IIRC,

 

Speed sensor is in a seperate 2 wire "t" shaped connector.....not the round multipin connector.  It comes out of the back/center of the dash.  You need to gorund the black wire in that connector, and connect the Yellow/red to the EJ VSS wire.