Hopeful Soobie

Will do. The amount of oil wasn't excessive. There was a slight bit resting on the porcelain, but it was enough to be transfered to my finger. I didn't see any on or inside the coils or any coming out of their home. Sent from my SM-G975U using Tapatalk

Manual Sent from my SM-G975U using Tapatalk

Around 2k to 3k rpm I get a stutter I’ve been trying to diagnose. It is not a violent stutter, but definite loss in power until higher rpms (normal at 3k to 3.2k)Today, a relatively hot day, I noticed the stutter much more dramatically and noticed that, while stuttering, my feedback knock reached all the way to -11. My DAM stayed at 1. I’ve researched this but haven’t found anything quite like this. Running a stage 1 ots accessport tune. Also have a custom exhaust from the stock dp back (stutter happened before the exhaust and tune, but seemed less dramatic.) Stock air filter. Another issue is that my af learning 1 idles at +9.59 and sometimes higher when warm if that may be a correlation. Just changed the plugs with no change. The issue does get better when I reflash my ecu,but comes back quickly. Sometimes after just one drive. Also had a p0420 before I changed o2 sensors. Cel hasn’t come back on yet but it’s not been long since the sensor install. My thoughts... possible bad knock sensor since my DAM is consistent. If not, knock may be picked up while stuttering strictly from the stutter itself? Or, something is seriously wrong and I need to get to the bottom of it fast, as this is my daily driver. May be worth mentioning that there was a bit of oil on 2 of my old plugs, which I hear is normal, but figured I’d make sure. Any thoughts? Sent from my iPad using Tapatalk

Nope just figured. Haven't looked into it yet. Still learning. Sent from my SM-G975U using Tapatalk

Its the V3 ap. I picked up a rear o2 but they gave me the one for the n/a engine, so the wires weren't long enough [emoji849]. Ordered a 234-4446 for the rear. Will get it Tuesday and will be back with an update. The midpipe and resonator are gone. As is the rear cat. If this o2 doesn't work I guess I'll look into the downpipe. Will be doing plugs and wires in the meantime. Sent from my SM-G975U using Tapatalk

I can take some pics tomorrow. The first one I got fit fine. I saw a video on YouTube of an 08 gt and it was the same setup as mine. Not sure if its just an 08 thing. But I went and got the first o2 I picked up. I'll try for the rear and replace it. If they doesn't work I'm just going bite it and the an invidia catted dp and go stage 2. Sucks to spend the money but it'll save me issues down the road.... if that finally fixes it.... So we can rule out the front o2. Unless its a bad part. But im not going to focus on that as of right now. Im getting an af learning reading reaching upwards of +15. So something is wrong. Maybe getting too much fuel from the cat possibly being clogged and messing with the reading? That would sort of make sense to me. It acts up the longer I drive it throughout the day. And in the morning after sitting overnight, it seems to run better than later in the day after being heated up and driven. If that gives any insight. Sent from my SM-G975U using Tapatalk

so i got the 234-9120 and the terminals dont fit...

Great thanks! Is the cobb stage 1 tune sufficient to delete the rear o2? Or should I keep it until/if I eventually go stage 2? Sent from my SM-G975U using Tapatalk

Awesome! I'll order that one and return the one I got from oreilly. Really hope that does the trick. Also, I failed to mention my AF Learning get a bit crazy. I've seen it go upwards of +15 at the highest. I only have the issues when the car is up to temperature. Which, in my head, further confirms the o2 causing the problem. Does that sound right? Sent from my SM-G975U using Tapatalk

O2 didn't fox the problem. Guess my next step is to get a new dp? Amy suggestions? Sent from my SM-G975U using Tapatalk

https://www.oreillyauto.com/detail/b/denso-3367/engine-sensors---emissions-25132/engine-sensors-25049/oxygen-air-fuel-ratio-sensor-12041/b265c6634ee9/denso-air-fuel-sensor/2349035/4240189/2008/subaru/legacy?q=Denso+o2&pos=2 This is the o2 I picked up from oreilly. W ha ts the difference between this one and the one posted in the sticky? Sent from my SM-G975U using Tapatalk

Sorry, another quick thought: Should I be concerned at all about the rear o2? Or is it irrelevant to this issue? Sent from my SM-G975U using Tapatalk

This link isn't working. I copied and pasted on Chrome and still no luck. I got my denso o2 in today. Sure hope it fixes the problem. If not ill look into getting a catted dp. Can't drive it right now as its on jacks awaiting brake parts. I'll have it done tomorrow. Any affordable options out there someone may recommend for the dp? And is any aftermarket catted dp compatible with stage 2? Right now I'm just running a stage 1 with my exhaust set up (straight piped after the downpipe) Also, this should definitely be my issue, right? In my head its either the o2 or the dp cat since the deleted cat wasn't monitored in the first place. Especially being the stock cat and o2 with 156k miles. But i get obsessive and research much, much too deeply. Im not trying to go crazy with mods. Just a fun daily. Maybe stage 2 eventually if not forced into it to fix this issue. Thanks guys. Sent from my SM-G975U using Tapatalk

So im pulling a p0420. Deleted the midpipe cat (which I was told by the shop wasnt monitored anyway?) And deleted reso and mufflers, cus exhaust sound. Im still dealing with the 420 and its driving very sluggish and loss of power around 2k to 3k in 2nd and 3rd gears most noticeably. Im thinking the o2 is either bad or my up pipe or down pipe cats are bad. Either way im thinking about going catless. My issue - do I spend the money on a new o2 sensor to risk it going bad again? If I buy a new sensor and go catless, won't I will get the rough driving equal to the way it is now since the o2 sensor is trying to correct the af ratio since no cat? I tried the spark plug anti fouler with no luck. I mean... in my head a catless system has to have some kind of simulator or dummy o2 in order to not confuse the engine and run smoothly, right??? I've done a bunch of research and can't seem to quite find the answer I need. If anyone has input or has gone through this, please help out. Or if there is an answer from another forum or video that I've not yet discovered, share link? I've saved posting on here for a last resort as to not waste time. Also i have a cobb accessport. If that matters. Issue was long before the ap though. Love you guys you're the best! 2008 Lgt Sent from my SM-G975U using Tapatalk

So is it ture that 07+ models did away with the UP cat? I have an 08 LGT and looked up a schematic of the exhaust and it listed a cat before the turbo (assuming the UP.) I was going to get a catless one but if mine is already catless, I obviously won't worry about it. Sent from my LG-H910 using Tapatalk