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Old 02-11-2009, 10:10 PM   #1
parkes
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Default EJ22 to EJ25 Engine Harness Difference......!?

So my car a 1999 legacy brighton wagon ej22 gone off and craped out. The oil pump went resulting in a seized Engine.

So here Iam i have a few engine, tranny swaps and alot misc mechanical experience on my plate so i do some researching(brief at that).

So i figure out i can swap a Ej25 phase 1 to my ej22 phase 2. In the threads i found no one mentioned the phases they just said it was possible.

So after prepping the motor and doing oil pan gasket, timing belt covers and cam angle bracket i notice that the ej25 has three main plugin in for the harness. 2 grey one white. The all go from larger to smaller. 1 large grey, 1 medium grey, 1 small white.

The harness that is currently in my engine bay(engine less) has 3 main harness pinouts but one just goes to the oxeygen sensors. The biggest one looks like it will fit but the medium one looks way different!!!

So what do i do? Will the engine not work?

Any Input would Be great thanks!!!
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Old 02-11-2009, 10:38 PM   #2
parkes
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O ya if it is any concern emisons dont matter....
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Old 02-12-2009, 07:47 AM   #3
Storm
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Shouldn't be any reason why you couldn't use the engine harness of the EJ22 on the EJ25. Change the TB, blockoff the EGR on the EJ25 and probably won't need to use the IACV off the EJ25 either if your EJ22 has it on the TB and the ECU is expecting it to be there.

I was just searching these EJ18, EJ22 and EJ25 swaps a few days ago, reading what we had done to get them running easily. You should be able to do the same thing.....maybe a couple tweaks.

Jay
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Old 02-12-2009, 09:55 AM   #4
parkes
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IAC on the ej25 is way different. On the 22 it on the TB and on the 25 its in the manifold. The tps harness connector is also different aswell.


How do i go about blocking off the egr?
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Old 02-12-2009, 09:57 AM   #5
parkes
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I would like to keep the iac......
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Old 02-12-2009, 10:32 AM   #6
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Sorry didnt read your post fully... That is what i was planning on doing however on the 25 there is a extra harness connector.

Guess i will see what that is about when i remove the manifold...
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Old 02-12-2009, 10:51 AM   #7
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Right.....so put the TB off the EJ22 onto the EJ25. You keep your IAC and simply cover up the hole left when you remove the manifold mounted IAC. I transfer the gasket shapes to plate aluminum and make my own blockoffs. Easy to do with a drill and dremel.

For the EGR, the easiest way is to leave it intact, but unplugged. Otherwise, remove the valve from the manifold, make a blockoff plate and seal it off. Then, with the EGR tube removed from the head, cut the tube so you can get one of the fittings off. Thread the inside of that fitting so you can put a "plug" in it, then screw it back into the head to seal it off. It works like a charm!

Jay
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Originally Posted by parkes View Post
IAC on the ej25 is way different. On the 22 it on the TB and on the 25 its in the manifold. The tps harness connector is also different aswell.


How do i go about blocking off the egr?
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Old 02-12-2009, 01:53 PM   #8
parkes
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Thats a great idea!!! I will go about that tonight... hopefully no problems
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Old 02-12-2009, 04:56 PM   #9
parkes
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Default Donkey drain!!!!!

O crap why didnt i think of this before?

The TB are way different and will not work and the coil pack....

The only way this would work is to swap the manifolds but the bolt pattern is different.

Is there any manifolds i can get with the Iac in the TB with the same bolt pattern as the ej25 phase 1?
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Old 02-12-2009, 06:02 PM   #10
parkes
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So i have came to a conclusion.

I have to delete the IAC all together

Use the ej25 tp and manifold.

Wire in the ej25 TB and Tps to the ej22 harness.

............
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Old 02-12-2009, 10:04 PM   #11
Storm
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You're probably saying the TB won't work on the DOHC manifold because the IAC air passage will be blocked off when installed, right? If so, Trace the gasket opening onto the manifold face, drill a hole to allow idle air through and clean the crap out of the inside to get any stray shavings/chips out.

Your current coil can stay.... with custom plug wires, I'm running standard 180* boots on a set of DOHC heads with no problems......you'll need them at both ends.....

Pick up an ACCELL universal plug wire kit for a V8 (w/180* boots). You'll get enough hardware and long enough wires to make your own set.

Jay Storm
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Old 02-13-2009, 12:36 AM   #12
parkes
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You mean the Ej22 coil pack will work? Because i already tried and it doesnt even close to bolt up. And to the TB it defiantly will not work because it is taller and the Iac would just dump into the air above the manifold...

I already went down the route of deleting the Iac.

and in regards to the egr what do i do about the other thing that coexists along with it.. It is connected by a vaccum hose from the egr and one vacum from the egr goes to a solonoid just under the manifold
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Old 02-13-2009, 12:40 PM   #13
Storm
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I'll have to look further when I get home. It's been a couple years since I swapped the DOHC around.......A last resort might be an EJ18 TB, which may not play nice with your ECU.....

I'm pretty sure I left that other emissions solenoid disconnected, but I can't say for certain.
Jay
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