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Old 03-13-2011, 11:57 PM   #1351
subydude
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That's the knock sensor. Probably shouldn't unplug that...
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Old 03-14-2011, 12:05 AM   #1352
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http://forums.nasioc.com/forums/show...8&postcount=17

I think I've found the answer to my question.
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Old 03-14-2011, 12:15 AM   #1353
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Quote:
Originally Posted by subydude View Post
That's the knock sensor. Probably shouldn't unplug that...

Don't you think I would get a CEL and code if that was the knock sensor I unplugged? The AVCS wiring kit from IAPerformance said something about disconnecting a switch under the throttle body on 04's.

Last edited by murrdogg24; 03-14-2011 at 03:53 AM.
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Old 03-14-2011, 12:47 PM   #1354
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It's very possible your setup is different. On my 02 Ver7 the only thing under the throttle body was the knock sensor. I'm not talking about ON the TB, but under the manifold. My setup was more simple in comparison with new models, but a picture of what you unplugged may help.

Usually the knock sensor sends a CEL when not connected, but flashing CEL usually means knock so unplugging it may mean something was wired wrong.

You should take what I say with a grain of salt since I'm writing my opinions from an office chair hundreds of miles away
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Old 03-14-2011, 01:13 PM   #1355
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Quote:
Originally Posted by subydude
It's very possible your setup is different. On my 02 Ver7 the only thing under the throttle body was the knock sensor. I'm not talking about ON the TB, but under the manifold. My setup was more simple in comparison with new models, but a picture of what you unplugged may help.

Usually the knock sensor sends a CEL when not connected, but flashing CEL usually means knock so unplugging it may mean something was wired wrong.

You should take what I say with a grain of salt since I'm writing my opinions from an office chair hundreds of miles away
Yeah mine is a Ver8 engine which has a temperature sensor in the intake manifold which had to be disconnected. From what I have been told the knock sensor is under the manifold towards the drivers side on the Ver8.
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Old 03-14-2011, 01:15 PM   #1356
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there's no need to disconnect it
it's there for GrN regulations, and can be used under MAP based ROM
it goes into different pin, and your ECU with stock rom is still looking for MAF's sensor temperature readings
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Old 03-14-2011, 02:28 PM   #1357
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I have a 2002 WRX. I have read that if I buy a V7, the ECU harness will plug right in and my only concern will be with wiring the AVCS.

What happens if you install a V8 in a bugeye? What additional wiring will I have to do? Any additonal things that you have to change, for a V8 to work in a bugeye?
The V8 will already come with turbo, up-pipe and downpipe. I guess, I would have to adapt the downpipe to the USDM catback
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Old 03-14-2011, 04:21 PM   #1358
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Yes! I just got my swap ordered from Jdm Racing Motors, can't wait until the end of the semester so I can get it in!

A word to anyone on the fence about ordering one up, with the recent events in Japan it's going to be important to order soon. It's going to be difficult to get anything out of the country for awhile. And when you do make sure to get it from a reputable shop like Jdm Racing Motors because in the coming months there is bound to be a bunch of waterlogged motors hitting the market from totaled cars. Just some food for thought.
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Old 03-14-2011, 06:43 PM   #1359
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Quote:
Originally Posted by MConte05 View Post
So I got my v8 STI EJ207 in my car last night. And started piecing together the other bits. Went to bolt on an HKS catted twinscroll downpipe I got for cheap. Turns out that doesn't fit at all with a 5-speed gearbox.

When trying to tighten the DP to the turbo, it lifts the DP up to the point it is jammed hard against the tranny crossmember in the rear. And then cannot tighten the turbo down enough. Will be trying to solve that issue soon...
Mconte05, would you mind helping me a bit with some advice?

How does the V8 engine harness mate with the 2002 WRX chassis harness?

What were the issues to look for, only the downpipe?

Thank you.
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Old 03-14-2011, 07:51 PM   #1360
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Quote:
Originally Posted by Vlad View Post
Mconte05, would you mind helping me a bit with some advice?

How does the V8 engine harness mate with the 2002 WRX chassis harness?

What were the issues to look for, only the downpipe?

Thank you.
I think one problem for bugeyes doing V8 swap's in the wiring for the A/C compressor is a different connector but you can just cut the plugs and wire them together. On my 04 WRX the A/C has the same type connector so it was plug and play once I swapped over my alternator + a/c compressor. The USDM a/c compressor won't bolt up to the JDM alternator due to different size bolts, so I just swapped everything over. Worked like a charm.
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Old 03-14-2011, 07:53 PM   #1361
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Quote:
Originally Posted by Hyper View Post
there's no need to disconnect it
it's there for GrN regulations, and can be used under MAP based ROM
it goes into different pin, and your ECU with stock rom is still looking for MAF's sensor temperature readings
Well I disconnected it because it was giving me a flashing CEL and that is annoying. Also I'm running the Ver8 JDM ECU so not sure about the GrN thingy...
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Old 03-14-2011, 09:48 PM   #1362
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Quote:
Originally Posted by murrdogg24 View Post
I think one problem for bugeyes doing V8 swap's in the wiring for the A/C compressor is a different connector but you can just cut the plugs and wire them together. On my 04 WRX the A/C has the same type connector so it was plug and play once I swapped over my alternator + a/c compressor. The USDM a/c compressor won't bolt up to the JDM alternator due to different size bolts, so I just swapped everything over. Worked like a charm.
Is this one of the connectors on the passenger side, where the engine harness meets the body harness?
Oh, you swapped alternator, as well as AC compressor?
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Old 03-15-2011, 09:45 AM   #1363
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For the AC, all I did was just swap my AC bracket from my old engine over to the new one. Simple as that. Used the same AC compressor in the WRX, since I never disconnected the system. Using the JDM STI alternator currently.

That really was the only other issue. AVCS wiring was a breeze. Just make sure to clean that IAC valve very well! That was the root of my startup issues and extremely high EGT's. Cleaned that up, moved the valve around inside of it, and the car has been running amazingly well since then. Already have put almost 3,000 miles on it in a month. 2 days after getting the idle EGT issue worked out, used the car for an all day recce session for 100 Acre Wood.

*EDIT* As for the downpipe. I believe a stock one will work just fine. I ultimately ended up getting the back half of the HKS chopped off, and a straight piece welded on to make it fit.

Last edited by MConte05; 03-15-2011 at 09:54 AM.
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Old 03-15-2011, 10:05 AM   #1364
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fixed

Last edited by scoobie_snacks; 04-13-2011 at 01:43 PM.
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Old 03-15-2011, 10:21 AM   #1365
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Quote:
Originally Posted by penusai View Post
question guys...

i just did my swap, v8 into my 2002.

got:

jdm ecu
jdm engine harness
IAP avcs kit

everything is good.

but there is one plug that i did not plug in because there wasn't a spot for it to go...

its on the same harness as the knock sensor, basically an extra plug.

on the USDM, its just the knock sensor plug.

I do not know where this goes.

its a black two wire female plug.

did not take a pic.

car runs perfectly fine, and no CELs.

Thanks.
Does anybody know? where does the extra plug from the V8 go, with a 2002 WRX?
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Old 03-15-2011, 10:25 AM   #1366
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So, there is an issue with the plug of the AC that can be fixed by keeping the compressor. OK.

Here's what I think. When reading the APS instructions for the hard turbo inlet, the USDM Sti, which is contemporary with the V8 EJ207, has an extra sensor by the PCV.
Is this the extra plug?
Not plugging it into the chassis harness, because there is no receptacle, will not cause a code or lack of readiness at state inspection?
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Old 03-15-2011, 10:47 AM   #1367
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I have no CELs, but I am running the JDM ECU. I cannot connect to my ECU with my scangauge, so I don't know if it will connect to the computers when you do the state inspection... No emissions or safety testing here in good ole' Arkansas.
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Old 03-15-2011, 10:56 AM   #1368
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but you know of this extra plug? possibly PCV sensor and you just left it unplugged?

From what i read above, V7 in a 2004+ WRX body, now you have a body harness plug for the sensor, but the V7 does not need that and it's 2002 V7 ECU also does not need that.
This is the opposite situation.
Edit: My V9 engine does not have the sensor.

Last edited by Vlad; 03-28-2011 at 03:30 PM.
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Old 03-15-2011, 10:59 AM   #1369
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The only plug I can think of off the top of my head is the one for the EGT probe. I will check tonight though. I don't really remember any extra plugs since I used the JDM engine harness.
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Old 03-15-2011, 11:02 AM   #1370
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Isn't there a wasted Coil pack connector on top of the V8 engines?
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Old 03-15-2011, 11:42 AM   #1371
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http://www.airpowersystems.com/wrx/intake/install.htm

Look at step 13, installation of a inlet tube on USDM 04+ Sti. There is a "sensor vent". This is a grey piece that is supposed to determine if you have a vacuum leak in the turbo inlet.
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Old 03-16-2011, 11:44 AM   #1372
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Quote:
Originally Posted by Vlad
http://www.airpowersystems.com/wrx/intake/install.htm

Look at step 13, installation of a inlet tube on USDM 04+ Sti. There is a "sensor vent". This is a grey piece that is supposed to determine if you have a vacuum leak in the turbo inlet.
I think that valve should be blocked off when using the inlet on JDM motors if I'm not mistaken.
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Old 03-16-2011, 11:58 AM   #1373
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Thanks for giving me some answers.
The valve is a valve that an 04+ USDM Sti would have, but a 2002 WRX would not have.
So the valve goes to the ECU, via a connector in the engine harness.
If you have a 2002 WRX, there would be nothing to plug it into, as far as chassis harness, I don't think.

Edit: The V9 also does not have the valve.

Last edited by Vlad; 03-28-2011 at 03:32 PM.
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Old 03-17-2011, 05:36 PM   #1374
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i made a thread about this, but maybe you guys will know. ive talked to a couple people and they seem to be confused as well...

i have a v7 spec c in my 04wrx, and right now im using the usdm ecu. I have the avcs wiring kit hooked up, but the problem is, everytime i tried to put in a jdm ecu, (tried 2 different ones) they start flashing a CEL... like its obd1. and my tuner (stimikey) cant tune it because of this... anyone experience this?
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Old 03-17-2011, 06:59 PM   #1375
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what version ecu are u using? V7 or V8?
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