Ej20k swap with the 550 robtune

Headlights to tailights and everything in between.

Moderators: Helpinators, Moderators

Post Reply
YetiSmasher
First Gear
Posts: 112
Joined: Wed Nov 12, 2014 6:55 am
Location: Portland, OR

Ej20k swap with the 550 robtune

Post by YetiSmasher » Mon Sep 02, 2019 5:06 pm

Hey y’all, so I recently just got done with my 20k swap but I’m having some issues with it running. It has the robtune 550 in it with all the original wiring done by rob as it was the very first car to ever get one. Some of you might have seen this car in the past 8)

First off, I’m have codes for the map sensor, throttle sensor and coolant temp sensor.

When the key is in the ON position the fans are always running at high speed and the temp gauge in the cluster reaches the top like its over heating. It has all new timing components along with an OEM water pump and thermostat. It also has a brand new mishimoto radiator along with the stock fans.

Also, the only way to start the car is when I reverse my plug wires... so cylinders 1&3 are backwards and 2&4 are backwards.. if I try and plug them into their correct ports on the coil pack the car will not start but only pop and sputter.

The timing is dead nuts and at this point I’ve ran out of ideas and hoping some of y’all can chime in.

Cheers

Bcaron1000
First Gear
Posts: 54
Joined: Thu Jul 27, 2017 6:05 am

Re: Ej20k swap with the 550 robtune

Post by Bcaron1000 » Fri Sep 13, 2019 11:03 pm

Cop swap em


Sent from my iPhone using Tapatalk

mike-tracy
Moderator
Moderator
Posts: 4921
Joined: Tue Aug 25, 2009 7:52 am
Location: Des Moines, Wa

Re: Ej20k swap with the 550 robtune

Post by mike-tracy » Sat Sep 14, 2019 8:47 pm

Are you running any ej20k electronics? Or is it an ej20k long block with ej20g electronics? or?
1992 Legacy SS 5mt, build in progress
Josh Colombo wrote:
Mon Jan 14, 2002 10:23 am
Wait....I'm confused now.

Bcaron1000
First Gear
Posts: 54
Joined: Thu Jul 27, 2017 6:05 am

Re: Ej20k swap with the 550 robtune

Post by Bcaron1000 » Sat Sep 14, 2019 9:42 pm

22t long block but I’m rewired to run a 20k ecu


Sent from my iPhone using Tapatalk

mike-tracy
Moderator
Moderator
Posts: 4921
Joined: Tue Aug 25, 2009 7:52 am
Location: Des Moines, Wa

Re: Ej20k swap with the 550 robtune

Post by mike-tracy » Sun Sep 15, 2019 5:25 pm

Ahh. I know literally nothing about ej20k electronics. Sorry bud
1992 Legacy SS 5mt, build in progress
Josh Colombo wrote:
Mon Jan 14, 2002 10:23 am
Wait....I'm confused now.

Legacy777
Site Admin
Site Admin
Posts: 27522
Joined: Tue Oct 15, 2002 11:37 am
Location: Houston, Tx
Contact:

Re: Ej20k swap with the 550 robtune

Post by Legacy777 » Mon Sep 16, 2019 5:43 pm

The coolant temp sensor on the dash and the one for the ECU are completely different sensors. So if both are acting up I would suspect there is a wiring issue. What have you done to verify the wiring of the coolant temp sensors and other codes back to the ECU?
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm

Bcaron1000
First Gear
Posts: 54
Joined: Thu Jul 27, 2017 6:05 am

Re: Ej20k swap with the 550 robtune

Post by Bcaron1000 » Mon Sep 16, 2019 8:25 pm

The weirdest thing I found when I did my 20k merge was that I couldn’t get it to show my proper coolant temps. It would just max out. I tried so many times to get it to work and had no luck. I ended up running an apexi power fc. So my hand controller would tell me my temps.


Sent from my iPhone using Tapatalk

YetiSmasher
First Gear
Posts: 112
Joined: Wed Nov 12, 2014 6:55 am
Location: Portland, OR

Re: Ej20k swap with the 550 robtune

Post by YetiSmasher » Tue Sep 17, 2019 5:18 pm

mike-tracy wrote:
Sat Sep 14, 2019 8:47 pm
Are you running any ej20k electronics? Or is it an ej20k long block with ej20g electronics? or?
20k longblock with a 22t engine harness and a 20g ecu

Bcaron1000
First Gear
Posts: 54
Joined: Thu Jul 27, 2017 6:05 am

Re: Ej20k swap with the 550 robtune

Post by Bcaron1000 » Tue Sep 17, 2019 5:31 pm

Coil on plug swap it to save the head ache of your coil problem.. I couldn’t get the throttle body to work on the 22t harness


Sent from my iPhone using Tapatalk

Bcaron1000
First Gear
Posts: 54
Joined: Thu Jul 27, 2017 6:05 am

Re: Ej20k swap with the 550 robtune

Post by Bcaron1000 » Tue Sep 17, 2019 5:32 pm

If you use the 22t throttle body along with the accessories it should work on any manifold


Sent from my iPhone using Tapatalk

Post Reply