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Old 07-06-2022, 02:13 AM   #1426
D-Rodman
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Ver 8 or ver 9 are not different to implement on your vehicle compared to a ver 7. You already know about the immobilized ecu issue, the major difference is the twin scroll turbo and having to buy a twin scroll specific down pipe, usdm length so you can hook up to your catback without having to lengthen your intermediate pipe


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Old 07-09-2022, 02:46 PM   #1427
Gigs90
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Quote:
Originally Posted by NordyPi View Post
I was planning on upgrading turbo and power when I finish college in 3 years. I figured I would upgrade the clutch for greater future power, but maybe I just wait until then and get a new one? I estimate I'll be driving between 2-5 thousand miles a year at most.

I was pretty set on AOS even without tracking in mind, since I know how helpful they are. But the fitment issues pose a challenge. So you swapped in a V9? Into which chassis? And was it just the engine, or also the trans and other drivetrain parts?

This V7 kit I found is really expensive, but the V9 is quite a bit cheaper even including full brembo corners. Even if I have to buy a V7/V8 ECU because the V9 ECU is immoblized, and a twin scroll downpipe, it might make more sense than the V7 kit for the price.
Yes I have had an S204 V9 engine in my car since 2015

Its a hodge podge of parts but its effectively a complete V9 swap now with 5x114 and a V7 Spec C gearbox.

We had to use a Version 8 ecu but it was flashed with a modified S204 map with a good amount of timing taken out of it that I ran until going flex fuel in 2019.

Twin scroll is totally worth it and its a newer engine so that is why I made that choice
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Old 08-03-2022, 11:56 PM   #1428
NordyPi
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Chapter/Region: RMIC
Location: Grew up in Missoula, MT
Vehicle:
2002 WRX Wagon
WRB

Default Gasket Refresh

Recommendations for any additional gaskets to replace while the engine is out?
Planning on installing IAG AOS and Killer B oil pan, pickup, and baffle.
Current Part List:
- head to exhaust manifold gasket 2x 14038AA000
- downpipe to midpipe gasket 1x 44616AA200
- valve cover gasket left 1x 13272AA075
- valve cover gasket right 1x 13270AA152
- valve rocker gaskets 4x 13293AA051
- wash-rocker covers 16x 13271AA071
- AVCS o-ring 1x 806939040
- exhaust donut 1x 44022AA123
- main rear oil seal 1x 806786040

planning on using the IAG Red Racing Timing Belt (stronger belt for higher RPMs), using the Aisin water pump and gasket, and subaru OEM thermostat and gasket.
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Old 08-08-2022, 09:49 PM   #1429
WooHooBars
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Default Tuning question

Hey everyone, sorry if this is a newb question, but I'm in the process of swapping a V7 EJ207 into my 2004 WRX, and everything I've found has said it's not safe to run the engine too much without a proper tune, even if I have the proper JDM ECU for the engine (people citing incorrect timing and/or compression). My question is why wouldn't the correct ECU be able to safely run the engine without a tune, exactly? I plan to get a tune regardless, but I'm still weighing my options, and am also academically curious.
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Old 08-08-2022, 10:02 PM   #1430
D-Rodman
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Quote:
Originally Posted by WooHooBars View Post
Hey everyone, sorry if this is a newb question, but I'm in the process of swapping a V7 EJ207 into my 2004 WRX, and everything I've found has said it's not safe to run the engine too much without a proper tune, even if I have the proper JDM ECU for the engine (people citing incorrect timing and/or compression). My question is why wouldn't the correct ECU be able to safely run the engine without a tune, exactly? I plan to get a tune regardless, but I'm still weighing my options, and am also academically curious.


Make sure the rom is correct for the particular engine. The reason to stay out of boost would be that the fuel octane in your area might be lower than what was in the original market the tune is for.


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Old 08-09-2022, 06:45 PM   #1431
Alaaddin
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hi guys, Idk if this was asked already, but do you guys think that if the car was set up for an EJ20x that this motor would work in a similar way?
It's a 2004 Impreza STI with an ej20x intake AVCS only with exhaust AVCS disconnected.
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Old 08-10-2022, 07:17 AM   #1432
D-Rodman
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Default EJ207 Info

Quote:
Originally Posted by Alaaddin View Post
hi guys, Idk if this was asked already, but do you guys think that if the car was set up for an EJ20x that this motor would work in a similar way?

It's a 2004 Impreza STI with an ej20x intake AVCS only with exhaust AVCS disconnected.


Your writing is not very good but I think I understand what you are asking. However, there is important information about your car that is not been provided. You are also asking in the wrong forum but Iíll try to help you.
Answer would be a no.


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Old 08-14-2022, 06:52 AM   #1433
WooHooBars
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Default Wiring/plugs/starting engine help

So I've installed a V7 EJ207 and JDM ECU into my 2004 WRX, and everything seems to be connected and attached properly, though the engine is not starting. It will crank fine and sputter a little like it wants to start but that's it. The engine did not come with a wiring harness and everything I've seen says the WRX wiring harness should work just fine. However, I have noticed that there is a large plug just behind the airbox which has far more wires feeding into the engine than are attached to it on the harness side (relevant photo attached), and am wondering if this could be my problem? Also, there is another plug just beneath that one that on the old engine connected to the uppipe for what I assumed was the cat, which the 207 does not have as far as I am aware. I also haven't connected the wiring for AVCS yet, perhaps it's as simple as the JDM ECU won't allow it to start without that? Any help would be greatly appreciated.
https://imgur.com/gallery/Re2HirO
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Old 08-14-2022, 08:00 AM   #1434
D-Rodman
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It may be as simple as the neutral position switch that is preventing it from starting. Check the early pages documentation for tips.


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Old 08-14-2022, 06:49 PM   #1435
WooHooBars
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Quote:
Originally Posted by D-Rodman View Post
It may be as simple as the neutral position switch that is preventing it from starting. Check the early pages documentation for tips.


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Thanks for the reply. If that were the case wouldn't the car just not crank as if I hadn't pushed the clutch in? Or am I mistaken?
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Old 08-14-2022, 10:43 PM   #1436
SunBurntGinger
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Quote:
Originally Posted by WooHooBars View Post
So I've installed a V7 EJ207 and JDM ECU into my 2004 WRX, and everything seems to be connected and attached properly, though the engine is not starting. It will crank fine and sputter a little like it wants to start but that's it. The engine did not come with a wiring harness and everything I've seen says the WRX wiring harness should work just fine. However, I have noticed that there is a large plug just behind the airbox which has far more wires feeding into the engine than are attached to it on the harness side (relevant photo attached), and am wondering if this could be my problem? Also, there is another plug just beneath that one that on the old engine connected to the uppipe for what I assumed was the cat, which the 207 does not have as far as I am aware. I also haven't connected the wiring for AVCS yet, perhaps it's as simple as the JDM ECU won't allow it to start without that? Any help would be greatly appreciated.
https://imgur.com/gallery/Re2HirO
Maybe its your MAF sensor. Make sure its not backwards. The wiring clip should be facing the front of the car.
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Old 09-15-2022, 09:14 PM   #1437
WooHooBars
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Default Update/Engine still not starting

Thanks to everyone who's replied thus far, I took your advice to ensure everything suggested was in check, and unfortunately, could not discover the issue. I went on vacation for a while and now I'm back to trying to get my car to start.

At this point I have installed the IATuning AVCS Bulkhead Wiring Kit, which I had high hopes would solve my problem because the kit includes wiring that communicates with the cam position sensors in the v7 EJ207. However, upon cranking the engine I have the same result as before. I decided to test the engine for spark and indeed there is none, which I assume to be because either some sensor is preventing the engine from getting spark, or there is some electrical/wiring issue causing the coils not to get any electrical charge. I replaced the spark plugs anyways to no avail, since I had ordered new ones and they finally came in. Plugging my OBDII scanner in after an attempted start yielded no results with the EJ207 ECU, however I decided to try it with the USDM 04 WRX ECU, and the following codes appeared: P1094, P1096, P1086, and P1088, all with the caption "Manufacturer control" listed below. I'm wondering if these are being caused simply by the USDM ECU not recognizing the sensors in the ej207, or if there could actually be an issue with the wiring to these components. I've also checked and double-checked all the relevant fuses. My hope is that it's something stupid I missed that I'll be able to fix without having to purchase and install an all new engine harness and wiring. Any and all advice is appreciated. If I forgot to add any details or information to this I'll post another comment later. Thanks!
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Old 09-15-2022, 11:11 PM   #1438
D-Rodman
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Are the coil packs from the ver 7 engine ? If so, they are 20 years old.
Check the engine harness to make sure there are no wire issues ?



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Old 09-16-2022, 01:08 AM   #1439
WooHooBars
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Quote:
Originally Posted by D-Rodman View Post
Are the coil packs from the ver 7 engine ? If so, they are 20 years old.
Check the engine harness to make sure there are no wire issues ?



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They are indeed. Would the coil packs from the USDM EJ205 be compatible or should I buy a new set? I looked around online and couldn't find a definitive answer.

Also yeah I've looked over the engine harness a few times as have a couple other people and everything seems to be correct. Of course I'll check again after switching out the packs just to make sure I'm not going crazy lol.
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Old 09-16-2022, 07:50 AM   #1440
D-Rodman
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02 Bugeye JDM STi
OBP BLACK

Default EJ207 Info

Swap the coil packs over. If your 04 coil packs are gray you may have to swap the black boots over from the ver 7 but try them first to see if they work without swapping boots.

I have a set of black coil packs I used for 4 years that are in perfect working condition I can sell you for a reasonable price. Pm me if you are interested.

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Last edited by D-Rodman; 09-16-2022 at 02:45 PM.
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Old 09-26-2022, 06:10 PM   #1441
Alaaddin
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Quote:
Originally Posted by D-Rodman View Post
Your writing is not very good but I think I understand what you are asking. However, there is important information about your car that is not been provided. You are also asking in the wrong forum but I'll try to help you.
Answer would be a no.


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Hey, I appreciate the reply. What I meant by my question was that I have an 04 Sti with a usdm ecu that is running an ej20x with the exhaust avcs left unplugged. What would happen if the exhaust avcs was just ignored and left alone on an ej207 with a usdm ecu? Hopefully that clears some stuff up about my car.

Last edited by Alaaddin; 09-26-2022 at 06:11 PM. Reason: missing quote
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Old 09-26-2022, 06:38 PM   #1442
D-Rodman
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Quote:
Originally Posted by Alaaddin View Post
Hey, I appreciate the reply. What I meant by my question was that I have an 04 Sti with a usdm ecu that is running an ej20x with the exhaust avcs left unplugged. What would happen if the exhaust avcs was just ignored and left alone on an ej207 with a usdm ecu? Hopefully that clears some stuff up about my car.

I donít know anything about ver 10 ej207


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