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Old 11-11-2013, 08:48 AM   #1
Bad Noodle
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Default BN's Project: EJ257, 6spd --> 99 Forester (Need help)

Apparently I have a problem with collecting parts.




And I have a 99 forester that is having some electrical problems.






And I built and engine just to see what it's like:



So why not just let it all work itself out.

I've never done a swap before, I've never built an engine before, so I'm not expecting great things.

This is just a learning project for fun. I'm not a racer, I just like building things. If it all works out, I'll end up with fun car I can beat on.


right now I'm going through the wiring harnesses and labeling connectors. Doing this has raised some questions:


1.) Deleting the ABS: I don't have a newer abs pump and don't want to buy one. The brakes on the fozzy are awful anyway, so I want delete the current abs, clean out the lines, getting a new MBC, and call it a day. Will this cause a problem in the ecu or with a v7 non-dccd sti tranny? Can I cut the abs contorller connetor out of the wiring harness?

2.) Deleting the charcoal canister: Everything back there is rusted and falling apart. The various switches, vales, pipes, everything is crap. To keep it, I'd have to buy new everything. So it'd be nice if I could just delete it and forget about it. Is there a way of doing this and still recycling the fumes? Are all the different components necessary to just pull in the fumes into the engine via the vacuum line?
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Old 11-11-2013, 09:47 PM   #2
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So for 1.) I found

http://forums.nasioc.com/forums/show...ght=abs+delete

That seems like it would work. But can I cut the harness and remove the connectors?


for 2.) I see you can put a filter on the hose going to the take. So is that it? Just remove everything but have one line going off the tank?
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Old 11-15-2013, 08:08 PM   #3
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hey guys, any info on how the immobilizer works?

Does it prevent the car from cranking
or
Does it disable something in the ecu?

I'm asking because I don't see any immoblizer connectors on the ecu pinout. So that leads me to believe I don't need to when i swap over the ecu wiring.

Any thoughts?
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Old 11-23-2013, 09:45 PM   #4
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I started taking the harnesses apart and have some questions. Since I'm deleting the abs, can I cut out the abs module connector and the individual connectors that go to the wheels out of the harness?

How about the air bag wiring? Can I get rid of that?

I'm not quite sure if I should cut out anything that's not connected to the ecu directly like the door connectors. Or if I should keep those and try to connect them to the connectors on the car
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Old 11-24-2013, 11:04 AM   #5
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It's too bad no one pays a bunch of attention to the Conversions sub forum. This looks like a cool project.

I don't know much about the immobilizer stuff, but I do know that the 04 FXT (I own one) and 04 STi do NOT have an immobilizer, so swapping the ECU on those (and perhaps the wiring if you have bad wiring) is a good way to go to avoid that nonsense. If you go with an 04 FXT harness make sure you get a manual ECU or you will have a bunch of trouble on your hands.
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Old 11-24-2013, 12:22 PM   #6
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Are you 100% sure about 04 STis not having the immobilizers? Either way.

The immobilizer prevents you from cranking the car. You would need the ecu, harness, key and immobilizer system from the harness for it to work.

If I can swap an entire harness, you can. I've done it about 3-4 times now. It's not as bad as it may seem. Putting it back together the correct way is the most difficult part I think.

Last edited by 25rsti; 11-24-2013 at 12:31 PM.
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Old 11-24-2013, 01:42 PM   #7
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Quote:
Originally Posted by 25rsti View Post
Are you 100% sure about 04 STis not having the immobilizers?
YES, I am sure.
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Old 11-24-2013, 08:37 PM   #8
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^ Thanks guys

So far I've got a large part of the harness apart. I'm trying to separate the wires I will be using from wires that i won't need.

I'm planning on deleting the abs because it's crap on this car and won't fit the 06 tr harness I have. So its just easier to get rid of it. At least I think. Correct me if I'm wrong.

I do have the immoblizer, key, transponder unit, and ecu. It would be cool if I could just get rid of the key and immobilizer and just have a push button start. But it doesn't sound like that could happen.

Any thoughts on the air bag system? I was going to get rid of all the wiring and airbags. I'm really just going to use the car for track days and home depot trips. It's gonna be a race beater. Is the air bag system critical?

Yeah the harness challenging but it's getting better as I figure out what each plug does. Still nervous about starting to clip plugs. Like deleting the secondary air pump system.

Right now the list is:
All air bag wires and clips
All abs plugs and clips
All DRL Stuff
Secondary air pump
TGVs

Any other suggestions?

not sure what else. It seems like some stuff will need to be merged. Like the HVAC wires, door wires, roog cord (not sure what this is yet)
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Old 11-29-2013, 01:42 AM   #9
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Im interested to see how this goes..
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Old 12-04-2013, 06:50 PM   #10
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Looks like you have a nice project brewing. In regards to the ABS, you shouldn't have any problems deleting it. However, you may want to consider changing some parts out to augment your braking, such as a bigger diameter brake master cylinder, different brake prop valve, and different calipers/rotors.

You can also delete the airbag system if you'd like and it shouldn't affect your engine/ecu. You may want to remove the cluster light though as it will always be on if you remove the system.
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Old 12-04-2013, 08:41 PM   #11
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^ Thanks for the info. good point about the proportioning valves. Didn't think of that.

It's a slow project, but I'm making progress. Going through the electrical diagrams is horribly time consuming. I'm making sure that when I remove a component, nothing that I would need is dependent upon it. But so far

ABS Module connector is gone
DRL module is gone
(Will remove diode as well)
Going through and removing the airbag/occupant detection system

I want to keep the air bags just in case, but I found the systems are different because the 06 air bag system has a occupant detection sub system that it's reliant upon. So the only way to keep the air bags is to remove everything from the 06 wiring, remove the ab wiring from the 99 and merge it with the 06. It might be too much work for 2 air bags though.

Any thoughts on what to do with the charcoal canister / gas tank recirculation system? It's all rusted to hell, so removing it is a good idea. But what components are critical to make sure I can fill up my gas tank without issue?
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Old 12-04-2013, 09:22 PM   #12
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The wiring will consume you! It was the hardest part of my swap.

For the airbags, you could retain the Forester system. The SRS/airbag wiring is virtually all separate from the ECU wiring. On my swap I kept the 94 Impreza airbag system. Are you keeping the Forester cluster, etc? If so you will only have to merge in the wiring for the engine/ecu, which is separate from the airbag system.

I don't know the answer of how to delete the evap system but I would think you need it to pass inspection because the Forester is an OBDii. You could probably source everything you need pretty easily and cheap from the classifieds or a junk yard.
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Old 12-05-2013, 09:13 AM   #13
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^ for you swap, did you swap in the fuse box and other wiring?

06 ecu needs the immobilizer
The immobilizer needs the keyless entry, body integrated module, ignition, other boxes
All those need the new fuse box

If there was a way to get rid of the immobilizer, it would save me tons of work, but I haven't seen a way to bypass it. I think a remote start box could do it, but that's just more complications.

So because of it, I think 100% of the wiring needs to be swapped...
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Old 12-05-2013, 09:13 PM   #14
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No, my swap was a little different than yours in that I retained most of my 94 wiring and merged in the 02 WRX harness stuff for the ecu, fuel pump system, and cluster. For the portions of the 94 harness that I removed, I then used the power/circuits to power the things on the WRX harness that I merged in. For example, all of the ECU/engine/trans wiring was removed from my 94 harness. All of the same stuff was removed from the WRX harness and wired in to replace what was removed from the 94 harness. The power from the old circuits/fuse box were then wired in to the WRX stuff.

I'm not as familiar with the immobilizer stuff. What are you planning as far as fuel pump, gauge cluster, and steering column?

You could swap in the 06 harness but you will then have to merge in the wiring from the old harness that pertains to whatever is kept from the Forester in the Forester (lights, combo switches, ac/heat controls, etc). Basically the opposite from what I did but the same principle.

In doing so, you can still delete the ABS wiring from the 06 harness and also merge in the Forester airbag wiring from the old harness into the new.
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Old 12-05-2013, 10:20 PM   #15
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Interesting...gives me some ideas. you have a link to your project?

For the rest:
fuel pump: Ebay a compete sti fuel assembly + harness and plug it in. will use forester tank though.
Gauge Cluster - Ebay a tr cluster
Steering Column - Have matching 06 tr steering column
Steering Rack - will try to get sti unit, if it's not too expensive
Tranny - Ebay a complete sti swap with brakes
Master Cylinder - Ebay sti unit
Then there's a bunch of performance parts...
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Old 12-05-2013, 10:28 PM   #16
Seahawk
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So are you doing the whole WRX dash swap with HVAC controls and cluster? Either way it sounds like using the majority of the 06 harness is the way to go. It could probably be as easy as clipping off the front and rear light harnesses from the forester and splicing them to the new harness; some of those may even be the same and line up fine in the chassis.

My project thread is over at another forum.
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Old 12-07-2013, 01:46 PM   #17
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I have an MY04 FXT ecu with a MY04 STI rom flashed on it with an open source tune to run my MY05 LGT swap as a way around the immobilizer and can bus system. The easiest way is going to be to create a standalone engine harness from the MY06 harness and merge that in to the forester harness then re-pin the ecu harness for the MY04 ecu
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Old 12-07-2013, 02:51 PM   #18
Bad Noodle
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Seahawks, that's a pretty awesome project. Job well done. Nice and clean.

^ that's not a bad idea about using a 04 sti ecu. That might be the way to go. It's actually a really good ideas the more I think about it.
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Old 12-20-2013, 02:21 PM   #19
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Quick update: Many many hours later spent studying wiring diagrams and pinouts, the harnesses look like:



and the stuff that didn't make it



Didn't take out as much stuff from the main wiring harness as I though would come out, but the body harness slimmed down quite a bit

Any thoughts to what other homework I should do before I start tearing the forester appart?
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Old 01-19-2014, 06:19 PM   #20
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Are you swaping the ej257 from a 05 sti? Because I'm thinking about doing it as well
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