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BrokenProjectGT

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  1. From reading other forums, I was under the impression that your clutch should be the weakest point in your drivetrain because it's cheaper to replace a clutch than it is to replace a transmission. So it should be preferred to use a stock clutch rather than something like stage 2. Is this incorrect?
  2. I'm curious about a tutorial on this as well as I'm in the process of piecing all the required parts to do the conversion. I saw a video on YT about sourcing the stock top feed rails from another car. I'll probably compile a tutorial once I figure out how to go about it and find all the required parts.
  3. @JT is correct. It is a twin scroll setup and the OEM JDM header does not have an O2 bung. I've came to the conclusion that there's no way around this other than having to weld a bung into the headers which I'm planning to do sometime this upcoming weekend. Though, the sensor will only be monitoring two cylinders which brings up slight concern.
  4. The reason I'm looking for a method of disabling the rear O2 sensor on the ECU is because my car has a weird surging effect and A/F #1 correction oscillation when in cruising RPM's around the 2k to 3k. The car has a TD04 turbo and the front O2 sensor was moved from the up pipe to the down pipe. Further research shows that moving the front O2 to the down pipe tends could possibly cause this issue since USDM ECU expects the O2 sensor to be in the up pipe and not further down. I've tried looking for anything that I can adjust related to A/F #3 on the rom using romraider but can't find anything which is why I decided to ask about the CL fueling target tables when I ran into this post while doing more research. I also tried following this post to see if I was able to adjust A/F #3 but I'm not able to find the values. Post from a couple years ago from user "unclemat": "The ongoing issue I had with twinscroll tune was a constant oscillation on steady throttle around 3k rpm. I think it has to do with the remote relocation of the front O2 sensor. I hope that zeroing AF3 correction limits (see this romraider thread) may help. For me the only way to eliminate this oscillation was to actually disconnect *rear* O2 sensor. " I was considering just unplugging the rear O2 but read that it would cause the car to run in open loop all the time. Now I know what some of you are thinking. Maybe it's a vaccuum/boost leak, injectors, gasoline, etc. I have gone through all that. Had injectors cleaned and flow tested, replaced intake manifold gaskets, replaced PCV, replaced and secured all vacuum line, smoke tested to make sure no leaks, tested using a brand new MAF, replaced air filter, tested the fuel pressure, new coils, new spark plugs. I even went as far as flashing the stock rom back on the car to see if it was an issue with the tune. I nearly gave up on trying to fix this when I ran into information that it could possibly be the rear O2. The P0420 code is already disabled on the ECU but I'm guessing that the rear O2 is still processing information regardless of the code being shut off. Once again, thanks for the help!!
  5. Hello All! I've been doing some research in trying to disable the rear O2 sensor on my Legacy GT. I was following a couple of posts on the romraider forum about using IDA to adjust the XML file but keep hitting a wall when trying to figure out exactly what to do. I search for the values mentioned in the post but can't find the values or any further direction on what to do. Looking at my car's rom (A2WC510N), I noticed that it had three closed loop fueling tables. CL Fueling Target Compensation (Load) CL Fueling Target Compensation A (ECT) CL Fueling Target Compensation B (ECT) I did more research on these tables and it seems these might be related to the rear O2 sensor. A few posts that I read mentioned about zeroing these tables would disable your rear O2 sensor. I'm not sure if it means just adjusting ALL the values on the table to 0 or just certain range values. I also saw another post mentioned setting all the values to -.0001 or something along those lines to basically disable the rear O2 sensor. Can anyone point me in the right direction? Feel free to correct any of my misinformation and pardon my newbie-ness as I'm learning as I go.
  6. Brief Intro: Bought a modified 05 Legacy GT that was running but had a weird jerking motion when driving it. It also had this issue where if I was parked and held on the throttle steadily, the RPMs would move up and down. No CEL so hunting the cause of this issue has been a pain. I took some logs and AF correction was all over the place as you go through the RPMs. Anywhere from -20 to +20. AF Learning would sit at -7. I did the usual things that are recommended like vacuum/boost leak test, spark plugs, coils but issue still remained. I decided I was going to clean the TB, change the manifold gaskets, swap out some vacuum lines, swap out the PCV assembly, and remove the injectors and have them cleaned/tested. Now this is where I ran into an issue. The previous owner claimed that the engine had Deatschwerks 650cc injectors. I remove the injectors and in one of the cylinders was a pool of fuel. I'm guessing the injector was leaking or malfunctioning. Instead of taking them to get cleaned I went online to find replacement injectors of the same type but couldn't find any reference of the Deatschwerks 650cc side feed injectors being made for my Legacy GT. I ended up buying OEM injectors to play it safe since I'm still learning about working on these type of cars. I'm currently in the process of piecing the car back together. I installed the OEM injectors and just have to reinstall the TB and Manifold. Now here's where I'm a bit concerned. I've always read that when anything engine related is changed on Subaru engines, the car requires a retune. So seeing that the injectors that it "supposedly" had were 650cc's, is it okay to run the car with the stock injectors which are 550cc's? I saw there's copies of the stock tune online. Would it be a smarter idea to load the stock tune until I can get the car retuned? I'm just looking for a little guidance/advice. It was previously tuned with opensource if that helps.
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