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Old 09-16-2018, 06:14 PM   #1
Chi_San
Scooby Guru
 
Member#: 53558
Join Date: Jan 2004
Chapter/Region: NWIC
Location: Deadford, OR
Vehicle:
2005 Baja Turbo
White/Silver/Black 3tone

Default Sadness... I sold my Baja. :(

Actually, I traded my Baja in.

For a Baja.

Yes. That's right. I traded a 2005 Baja Sport in for a 2005 Baja Turbo.

Sooo, I actually have some questions. No, I'm not going to ask how to get a hojillion HP out of it, since I know how to do that already.

I had a 2002 WRX Wagon for 8 years, and I tuned it with ROM Raider and ECU flash, on a borrowed laptop. The tune was good, but my 'wiring mods' were terrible, basically a pair of rocker switches soldered in in place of the test connectors and the reflash plug. So, now that I finally have a turbo again, I AM planning on road tuning it. However, I've been out of the game for a good 5-7 years, so I'm basically looking for a refresher more than anything else.

So, my questions: Is Tactrix still the way to go for logging, flashing, and checking CEL codes?

Am I going to need to pick up a kit, or is the Baja reflash connector the same as on the WRX, basically a 2 pin connector that you jumper, or is it like the newer ones, with a 4 pin connector that requires a special jumper?

Is ROM Raider and ECU Flash still updating/supported, or will I need to dig out a legacy Windows XP Machine to use it? Or is there a newer alternative?

And last question... Where's the best place to get in depth specs on the engine, IE, injector size, intake and exhaust valve specs, head info, etc., that doesn't charge money, or doesn't require me to go to the library?

Yay. Subaru #7 for me. 3 Legacies, a GL Turd (cough), a WRX, and two Bajas. Out of them, one was totalled, the rest were scrapped (cough), traded in, or sad WRX, repoed.
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Old 09-17-2018, 09:38 PM   #2
Hawk296
Scooby Specialist
 
Member#: 14555
Join Date: Jan 2002
Chapter/Region: MWSOC
Location: MI
Vehicle:
1995 Impreza L
Baja

Default

The 05 baja Turbo is alittle different than the 02 wrx. You dont need the jumper anymore. You Just need to connect the connectors under the dash.

Romraider has been kinda abandoned since the glory days you remember, but unless you go standalone ECU, or swap the ECU with an STi or FXT and add an accessport, it’s still the best way to go.

The 05 Baja turbo is an EJ255 Identicle to the 04-05 FXT. That being said its the same as the 04-05 STI but with a smaller turbo, intercooler, catted uppipe, and a non red intake manifold.

The injectors are the same STI yellow top 550cc sidefeeds as the 04 sti. Heads are the same as well with the sodium filled exhaust valves etc. The factory service manual which I know used to be on scoobytruck and i think is linked on the facebook group lists all of those specs in the engine section.

I’m still running my rom raider tune 120,000 miles later and have also added the merpmod patch for launch control and no lift shifting.
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Old 09-18-2018, 04:59 AM   #3
Chi_San
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Member#: 53558
Join Date: Jan 2004
Chapter/Region: NWIC
Location: Deadford, OR
Vehicle:
2005 Baja Turbo
White/Silver/Black 3tone

Default

Quote:
Originally Posted by Hawk296 View Post
The 05 baja Turbo is alittle different than the 02 wrx. You dont need the jumper anymore. You Just need to connect the connectors under the dash.

Romraider has been kinda abandoned since the glory days you remember, but unless you go standalone ECU, or swap the ECU with an STi or FXT and add an accessport, itís still the best way to go.

The 05 Baja turbo is an EJ255 Identicle to the 04-05 FXT. That being said its the same as the 04-05 STI but with a smaller turbo, intercooler, catted uppipe, and a non red intake manifold.

The injectors are the same STI yellow top 550cc sidefeeds as the 04 sti. Heads are the same as well with the sodium filled exhaust valves etc. The factory service manual which I know used to be on scoobytruck and i think is linked on the facebook group lists all of those specs in the engine section.

Iím still running my rom raider tune 120,000 miles later and have also added the merpmod patch for launch control and no lift shifting.
I was having a wastegate CEL (P0244 I think), which turned out to be caused by a hole in the boost line going to the wastegate actuator. Fixed that, and now I no longer have a CEL code... And so I won't go hunting for a replacement TD04.

Does the EJ255 have AVCS, same as the STi? That's actually the one thing i'm unsure of... If I can find myself a cable and a laptop, I'll read up on how to tune with AVCS.

And the 550CC injectors means that with a TD04, there's a ton of tuning headroom. That's quite nice to know... My WRX had the 440's, and I ran out of injectors at 17 PSI of boost. I don't want to hit that wall again, at least not with a TD04.

Right now, the biggest thing I really am after is logging, though. I guess I'll go find a Tactrix cable and start looking for a good Laptop. Does ROMRaider at least run in Windows 10 or Windows 8.1?

Oh yeah... My Baja Sport was California emissions. My Baja Turbo is Federal. That alone made it worth it all... lol
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Old 09-18-2018, 04:12 PM   #4
Hawk296
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Member#: 14555
Join Date: Jan 2002
Chapter/Region: MWSOC
Location: MI
Vehicle:
1995 Impreza L
Baja

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Intake side AVCS only. Just like the STI.

RomRaider worked the last time I tried it on my old Toshiba running Windows 10.
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Old 09-20-2018, 05:37 AM   #5
Chi_San
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Member#: 53558
Join Date: Jan 2004
Chapter/Region: NWIC
Location: Deadford, OR
Vehicle:
2005 Baja Turbo
White/Silver/Black 3tone

Default

Well... my last turbo vehicle was a 2002 WRX, which had no AVCS, and was only 2 liters. I set that car up for maximum low end boost, so I'm actually pretty at home with the EJ255 and a TD04. 99% of my driving is at low RPM, so having the power on tap at 2,000 RPM is more my style.

I'm baffled by this vehicle's history, though. The previous owner threw a TON of money at this thing, I'm guessing for some minor drivability issues. It's got a rough idle, and when I first got it, it was hitting fuel cut when at high throttle in 4th or 5th gear on the freeway. There's a receipt for a boost control solenoid replacement, yet... I found a hole in the boost line to the wastegate actuator. I'm guessing the really badly corroded positive battery terminal is the cause for the rough idle, though it might be the throttle.

Which brings me to the drive by wire. The throttle buzzes quite loudly when idling, is this an indication of an issue? Or should I fix the positive terminal and possibly the positive battery cable, then check it? I'm going to replace the battery as well, since it's a cheap POS, and I like going up in the mountains in the winter, so a beefy battery is a must.

I just don't understand why a Dealership can let a customer throw close to $6,000 at a vehicle and never even bother with the most simple basics first... I mean, maybe the PO walked in and said 'I want these parts replaced', but I kinda doubt that...
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Old 09-23-2018, 01:35 AM   #6
Chi_San
Scooby Guru
 
Member#: 53558
Join Date: Jan 2004
Chapter/Region: NWIC
Location: Deadford, OR
Vehicle:
2005 Baja Turbo
White/Silver/Black 3tone

Default

So, I'm still dealing with the lumpy idle. I replaced the positive battery terminal, my next step is to replace the battery, spark plugs, and all of the boost hoses that go to the wastegate actuator. I need to get the little hose clamps for the hoses, as most of them are missing. Any idea where to get replacements?

I was able to determine that there is no rust at all under this thing, which I'm surprised by. Well, the exhaust is rusting, but that's fine.

Speaking of exhaust, does the 2004 Legacy GT exhaust work on the Baja? Or am I going to have to get something and have it modded to fit?
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Old 10-15-2018, 07:12 PM   #7
Baja_Gernaut
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Member#: 229922
Join Date: Nov 2009
Chapter/Region: Tri-State
Location: New Jersey
Vehicle:
2005 F-Inductd BAJA
rumble black

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If you still have that problem, inspect your air flow meter, that is an area people overlook
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Old 10-16-2018, 11:56 AM   #8
Mitenka
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Member#: 489041
Join Date: Aug 2018
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Thanks for this thread you two, I just bought a 2005 manual turbo Baja, and will be delving into the world of tuning. I think this information will be pretty helpful for me.

edit: three
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Old 10-17-2018, 05:42 AM   #9
Chi_San
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Member#: 53558
Join Date: Jan 2004
Chapter/Region: NWIC
Location: Deadford, OR
Vehicle:
2005 Baja Turbo
White/Silver/Black 3tone

Default

Quote:
Originally Posted by Baja_Gernaut View Post
If you still have that problem, inspect your air flow meter, that is an area people overlook
Yeah, that's actually the first place I looked. Hah. In fact, I unplugged the MAF sensor completely, but my misfire persisted.

I have determined that I have a bad coil pack. I'm probably going to replace two of them, since both the passenger side coil packs are held on by zip ties. I will be removing them both soon, and new ones will go on. At the same time, I'm going to drop in Group N engine mounts, an upgraded wishbone top/rear motor mount, and a Group N transmission mount. I also have a garbage UP I'll be dropping in at the same time, again, since everything will be unbolted and removed.

Still looking for a cable... The laptop has been purchased, and ROMRaider is loaded up and ready to go.

One question... Is there a gauge pod that fits the Baja? I'm thinking A Pillar. I'd like to get a Boost/Vacuum gauge, a Pyrometer, and a Wideband, but I don't want to hack the dash up. If I have to, I'll buy a replacement A Pillar trim piece and hack it up, then if I need to go back to stock, or whatever, I can just put the stock trim piece back and have it look nice...
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Old 10-17-2018, 08:46 PM   #10
Baja_Gernaut
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Member#: 229922
Join Date: Nov 2009
Chapter/Region: Tri-State
Location: New Jersey
Vehicle:
2005 F-Inductd BAJA
rumble black

Default

Thatís good you checked it. Hopefully a valve is not chipped like it happened to me and itís a long story but got it fixed so switch around coil packs to determine misfire.
As far for engine mounts, that will be one of the best upgrades you can do because I kept on breaking driveshafts on oem mounts.
I had a pro sport boost gauge with a pod and it was functional and out the way so itís a preference with a budget on mind. Keep us posted
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Old 10-18-2018, 02:12 AM   #11
Chi_San
Scooby Guru
 
Member#: 53558
Join Date: Jan 2004
Chapter/Region: NWIC
Location: Deadford, OR
Vehicle:
2005 Baja Turbo
White/Silver/Black 3tone

Default

Yeah, I got the misfire to stop for a few days by pressing on the connectors on the coil packs on the passenger side (the side with both coil packs zip tied on), so I'm fairly certain that's the problem.

Does the Legacy A Pillar triple pod fit the Baja? Or am I going to have to just get single screw on mounts and screw them to the existing pillar, and drill holes for the wires?
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Old 11-05-2018, 01:13 PM   #12
peirogi_baja
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Member#: 491366
Join Date: Sep 2018
Chapter/Region: South East
Location: North Cakalaky
Vehicle:
2006 Baja
Blue

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The title had me scared...
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Old 11-11-2018, 04:02 PM   #13
Chi_San
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Member#: 53558
Join Date: Jan 2004
Chapter/Region: NWIC
Location: Deadford, OR
Vehicle:
2005 Baja Turbo
White/Silver/Black 3tone

Default

Well, a little update. I found my misfire is on Cylinder 4. Gonna swap out coil packs and see if it stops. I also was able to pull the base map off the ECU, and I did some preliminary logging. It's running the boost up to 15 PSI in first and second gear at WOT, even though boost target is 11.8 PSI.
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