Skip to content
View in the app

A better way to browse. Learn more.

Ultimate Subaru Message Board

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Loyale EJ swap: fuel pump relay splice

Featured Replies

Guys Im having trouble getting my EJ swap to start.  Im not sure if I spliced the EJ harness fuel pump relay into the correct point.  I found the blue relay plug above the Loyale ECU, which I believe is the ea82 fuel pump relay, and I spliced into pin 3.  The color codes don't match what my manual says but from my searches I think that is the correct relay.  Also I can hear the pump run for a second as soon as the car is turned on but nothing when cranking.

 

Please help!  Thank you, I really want to get this thing running.

  • Author

Also this is an automatic seatbelt model.  I just discovered that it grounds the fuel pump through a different circuit.  Could that be part of my problem?

Your using the ea fuel pump relay?

 

If you can hear the pump turn on fuel pump relay is working and you have it right.

 

Check you starter silly wire, it's the black clip on the back of the starter on the pig tail.

 

Picture would help to see what you got going on.

Edited by Prwa101

  • Author

No I'm not using the EA fuel pump relay (FPR).  The black/red wire from the EJ FPR (pin 3) goes to the fuel pump.  I am splicing it into the existing fuel pump wiring under the dash at the EA FPR.  

 

lbck.jpg

 

My EA wiring diagram shows: pin 1 blk/wht, pin 2 blk/wht, pin 3 blu/blk, pin 4 blu/wht.  

from the pic you can see the wires are colored differently

 

Just trying to figure out which wire to splice. 

Edited by Carl B.

  • Author

I know the starter wire you're referring to.  Should I be using the EA or EJ starter wire?  Car turns over with EA starter wire but not with EJ one.

Year and engine of Loyale?

 

Just checked.  Auto belt or not does not affect ground.

 

Auto belt models there is a "rev sensor" similar to old carbie F.P. units that cuts power to the relay if no TACH. signal.

 

This would only affect the trigger side of the relay....not the actual F.P. power.

 

Since your are tapping directly into the BLack/Red wire out of the EJ relay directyl to the Blue/Black wire at the EA plug you should be good.  The Ground side of the fuel pump is directly to body.

 

This is all for SPFI......see below for other.

 

 

 

 

****MPFI models F.P. grounds though the ECU...not the body....so a ground must be added for pump..otherwise the same for EJ swap  MPFI only *****

Edited by Gloyale

  • Author

What about the starter wire Prwa101?  The way I interpreted Numbchux write up was that its not essential to hook up, its only for different fuel mapping on cold starts.

 

 

It Starts!  I feel pretty darn ridiculous but I spliced into the wrong blue relay.  I found the the correct one and she fired right up!

 

Thank you all

Edited by Carl B.

Haha nice job! If its starts it shouldn't matter I guess.

 

Always refute to the wiring diagrams, from what I've seen there always right. Haha.

Please sign in to comment

You will be able to leave a comment after signing in

Sign In Now

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.