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Old 09-02-2012, 10:57 AM   #4026
pghana66
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Quote:
Originally Posted by N-Bomb

The ECU is already connected... that pic is from inside the car. I have no cables or anything to plug in to do what you're asking, nor do I want to spend a ton of money just to find out what my ECU code is. :\
romraider is free to dl. obdII can be bought off ebay for $15 or less.
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Old 09-02-2012, 11:31 AM   #4027
iNfEk
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Quote:
Originally Posted by N-Bomb

The ECU is already connected... that pic is from inside the car. I have no cables or anything to plug in to do what you're asking, nor do I want to spend a ton of money just to find out what my ECU code is. :\
Well you could borrow a cable from someone is one option or the second would be as suggested earlier and look for a cheaper alternative like eBay. Rom Raider is free. It'll insure proper information is given to those thing to help and it'll insure you know what you have. I understand your concern but my suggestion was to help. That is all. Good luck
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Old 09-02-2012, 12:43 PM   #4028
N-Bomb
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Quote:
Originally Posted by iNfEk View Post
Well you could borrow a cable from someone is one option or the second would be as suggested earlier and look for a cheaper alternative like eBay. Rom Raider is free. It'll insure proper information is given to those thing to help and it'll insure you know what you have. I understand your concern but my suggestion was to help. That is all. Good luck
No, I do appreciate the help, but as I said, I'm new to the whole electronics side of things, and the interface off the rom raider site is over $100, so that was a bit shocking.
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Old 09-02-2012, 03:56 PM   #4029
iNfEk
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Quote:
Originally Posted by N-Bomb

No, I do appreciate the help, but as I said, I'm new to the whole electronics side of things, and the interface off the rom raider site is over $100, so that was a bit shocking.
Right. However, there are older interfaces sold and I'm not sure if you can use the ones on eBay ("USB to OBDII") which are less than $15. If you can then that's not bad. Borrowing requires no money. Just downloading of software.
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Old 09-02-2012, 11:27 PM   #4030
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Quote:
Originally Posted by OppositeLock View Post
I've recently had some time to revisit this and have some additional questions. I traced all of the wiring based on the DS1 diagram and everything is there and pins appear to be in the right places. All connectors are connected firmly and grounds seem ok. I logged my NPS and gear calcs. The results were, NPS=1 and Gear=6 when in neutral and when in between gears. When driving, NPS=0 and Gear does not always = the gear I am in because I have a 5MT and I assume stock v8 6MT calcs in the rom.

Can anyone tell me if I either need to invert the NPS or replace it based on the above? Thanks in advance!
Can't help you with the gear portion, but NPS should be 1 in neutral and 0 while in gear, so your NPS looks fine.
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Old 09-02-2012, 11:38 PM   #4031
rocketperson7
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For what it's worth..

The ebay cable is great for datalogging and looking at things like your ECU ID and are great for people who like to know what their car is doing, but have no intention of tuning

you only need the zomg expensive cable to reflash the ecu
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Old 09-03-2012, 02:33 PM   #4032
N-Bomb
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So, if we put aside the ECU for a second, is there anything mechanically that could be causing my odd starting problem?
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Old 09-03-2012, 03:43 PM   #4033
azscooby
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Speaking of V9 ecus, I was cruising ebay and came across two V9's being sold as V8's...
They were definitely V9's as you could see the lengthened downpipes and the V9 TMICs, they weren't Spec C's. The tranny codes were V9 as well.
My guess is they are having a very hard time selling V9s as the older V8 and V7 are probably not as common and their condition is degrading.

I would encourage everyone who is looking to buy that you do your due diligence and make sure you know what to look for, you don't want to get an immobilized car without all the parts needed to make it run.

Though I guess on the bright side all you'd really need would be the earlier ECU.
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Old 09-03-2012, 08:35 PM   #4034
WhiteBgeye02
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yeah its the point were the ecu's out there which are v7 and v8 are becoming more rare. next time i find one on the fs i am buyint it for my own good just incase. knock on wood.
as far as nps settings for 1/0 if you get your rom inverted for the nps like i did its opposite because of various transmisisons and engine mismatching. i have a v8 engine but using a 05 5mt trans which had opposite nps output.

make sure if your avcs is malfunctioning the iat sensor on the bottom of the mani is unplugged. your nps sensor is correct for the given trans. and the car is out of rough correction mode and up to temp before expecting it to log anything more than 1 or 2* of adv.
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Old 09-03-2012, 11:14 PM   #4035
azscooby
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I might add a somewhat obvious condition to seeing your avcs working.....the car must be moving. This had me stumped for quite some time.
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Old 09-03-2012, 11:24 PM   #4036
Torquey
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Which USDM year models have the same outer timing belt covers, as the v8 EJ207? The one I'm looking at has a small hole on the passenger side.
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Old 09-04-2012, 12:13 AM   #4037
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Quote:
Originally Posted by Torquey View Post
Which USDM year models have the same outer timing belt covers, as the v8 EJ207? The one I'm looking at has a small hole on the passenger side.
I bought ones for an 04-07 STI, I believe the 06-07 wrx ones are the same too
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Old 09-05-2012, 02:50 PM   #4038
Deedz
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Any EJ207 owners running a 4EAT? Requiring some help on a few issues...thx!
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Old 09-05-2012, 02:53 PM   #4039
iNfEk
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Quote:
Originally Posted by Deedz
Any EJ207 owners running a 4EAT? Requiring some help on a few issues...thx!
Which would be?
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Old 09-05-2012, 03:26 PM   #4040
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Quote:
Originally Posted by Vlad View Post
If all the codes you posted are correct and under the cover of this ECU, it is what the label says it is, you're running an EJ207, with a version 8 EJ205 ECU.

The business with the lack of useable ECU's for V9 continues....
AVCS EJ205 ECU should be plenty usable though, right? As long as you use the right ROM?

Someone who can re-flash can just head over to the romraider database and get a 2005 STi ROM and re-flash and be good to go right? Shouldn't really matter what ECU they have as long as it has the right pinout? (and isn't immobilized, of course.)

I mean, you don't really want to use any JDM ROM as-is anyway due to fuel quality differences, you're going to need to re-tune anyway. Isn't all you're really after is a starting point on startup, cold start, etc... with the right sensor scalings?

Am I oversimplifying?

Last edited by Concillian; 09-05-2012 at 03:57 PM.
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Old 09-05-2012, 04:44 PM   #4041
Deedz
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Quote:
Originally Posted by iNfEk View Post
Which would be?
Well of course I don't want to run the stock WRX (MY04) ECU as it doesn't support the AVCS. I already did the AVCS wiring addition, and I'm not interested in running the V7 without it. So, as of now the car runs and drives with the V7 JDM STI ECU, but it doesn't shift properly at all in 3rd and Drive.

The only code I get coming up is the AT Temp light blinking immediately on start up, which tells me that sensor isn't being read properly with the JDM V7 ECU in. The transmission feels like the TC is slipping but it's very weird since it's feels this way even at low RPM. It also feels like maybe the pump is producing enough pressure.

I was supposed to get it tuned Saturday which I thought would smooth out shifting, but my tuner figures that the V7 STI ECU probably doesn't have tables to support the AT. He also figures that the reason the transmission isn't shifting right it due to that. If the ECU can't communicate properly with the TCU it wont retard the timing in order for the transmission to shift smoothly at the shift points the TCU is sending.

Other than that it pulls good in 1st and 2nd though, makes me totally want to make this happen.

So, is my only option a JDM WRX AVCS ECU from an AT? Or Stand Alone, or a piggy back ECU on the JDM V7 STI ECU?

Anybody else have experience running the STI ECU with the 4EAT?
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Old 09-05-2012, 04:46 PM   #4042
Clark Turner
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Over the last 10 years a few have tried this. I dont know why. But the best bet is to get the standalone controller for the trans.
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Old 09-05-2012, 05:04 PM   #4043
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Quote:
Originally Posted by Concillian View Post
AVCS EJ205 ECU should be plenty usable though, right? As long as you use the right ROM?
Am I oversimplifying?
I think that the ECU are not the same.
People want them to be universal, like a PC, but they're not.
Also, the ROM is only a part of an ECU "operating system".
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Old 09-05-2012, 05:50 PM   #4044
Deedz
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Quote:
Originally Posted by Clark Turner View Post
Over the last 10 years a few have tried this. I dont know why. But the best bet is to get the standalone controller for the trans.
Any idea on makes of such a controller? And reason why I ended up with an auto in the beginning is because of my wife. Now I got used to and like the constant pull up a turbo spooling with an auto. I like being different, and the 207 hauls ass with the 4EAT.

P&L Motorsports has an 06 or 07 STI stock block upgraded turbo, cobb tuned with a IPT Performance 4EAT it runs 11.2 sec in the 1/4 mile and an even crazier 1/8 mile time that I don't recall off hand. Pretty damn good for a slush box I'd say!
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Old 09-05-2012, 06:04 PM   #4045
iNfEk
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If I remember right the V7 ECU (similar to the WRX ECU from 02 anyway) had AT maps in there as well. Anyone correct me if I'm wrong. I can't remember which pin it is though on the ECU that tells the ECU if it's manual or automatic transmission connected.
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Old 09-05-2012, 06:54 PM   #4046
Deedz
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Quote:
Originally Posted by iNfEk View Post
If I remember right the V7 ECU (similar to the WRX ECU from 02 anyway) had AT maps in there as well. Anyone correct me if I'm wrong. I can't remember which pin it is though on the ECU that tells the ECU if it's manual or automatic transmission connected.
Interesting!
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Old 09-05-2012, 08:57 PM   #4047
iNfEk
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I don't have my rom here from my version 7 ecu nor do I have rom raider on my work pc so can't help
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Old 09-05-2012, 09:03 PM   #4048
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I asked this same question a while back and never really got an answer. I have a Ver. 8 JDM STi swap and it was originally tuned for 91 Cali gas with a 3" catless turbo back exhaust. The exhaust system was an HKS HI-power, which is a pretty free flowing exhaust system.

The HKS system was to loud for me so I switched to an Invidia Q300 system. My tuner was concerned that it would change back pressure too much and require a re-tune. So I logged it and he told me I was still safe on the tune I have.

I want my car even quiter now, so I am looking to install a Magnaflow 3" hi-flow stainless steel cat in my system. My question is will installing a cat change back pressure enough to warrant a retune since the full exhaust system has changed since the original tune was done? What would running with extra back pressure do to the tune?

Tom
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Old 09-05-2012, 09:43 PM   #4049
mrxr250rider
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im not positive but i would think it would run richer with a more choked up exhaust. aslong as your still with a 3" exhaust i dont think a retune is needed or worth it.

i changed quite a few things before i got retuned. catback,bov to bpv,perrin tmic to sti tmic,stock wg actuator with ebcs to avo actuator on wastegate pressure. it never ran worse or blew up.

i did some logs and sent them to clark,eventhough my old map was crap he never said it was dangerous.

it did run quite a bit better with retune but i only gained 8whp and 17tq over the old tune with the same psi.
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Old 09-05-2012, 09:50 PM   #4050
mrxr250rider
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sometimes i think people take tunes too serious. a wideband would be a great thing to have. aslong as your not risking blowing it up a retune isnt needed and prob wont help much unless your changing something drastic.

also i would try to find a good flowing quiet exhaust. my greddy evo 2 is great. flows better than my autospeed twin tip did and its quieter!
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