K so, theres many things I have already done to my tC, ended up gettin a cel and I'm to the clueless part now and am about ready to spend money at toyota to get it checked but I'm not the kinda person ever to do that. Let's start it off like this.. I have code P2195 which is bank 1 sensor 1 stuck lean.

I have full header/spipe/exhaust did the antifouler trick works, great got resonators welded in,, sounds great. Also a CAI.

Decided not to deal with raspiness and go back to UEL header. Had another problem with the main o2 sensor stuck in my 4-1 header so yes. I went to toyota and had to buy the 230$ primary 02 sensor (the air-fuel one)

Got the sensor, stuck stock header back on, took out the antifouler cause I was told it was not needed with stock header even with a huge s-pipe and no other cats. Still was in "tuning mode" after disconnecting the battery before I had to go to work and bam CEL. Sorry this is so long You just need to know the whole story before you ask about the points I miss.
I have no fender wells (another long story), decided i'm not going to drive in rain obviously without converting to short-ram mode cause the tire will basically throw water at the CAI and soak it=not good. That day on the way to work bad rain came down and I basically decided to troop through it on the highway instead of pulling over,, got a little bogging sensation through some parts, I mean i understand it wont hurt for a little moisture to be running through the motor, its basically getting burnt immediately into steam as far as i Know when you hydrolock a motor is when you fully suck in water completely and it eff's sht up. Most importantly, it won't run at all. I believe at that point CEL came on about 15miles after the ecu was reset. But I still DD fine, even today in my long commutes to work.

What it's doing: (other then the p2195) I'm sure it has to deal with something with that. that deals with the primary o2 sensor and the MAF, correct?

Under partial throttle mostly after 3k (vvt-i) it will lag like its trying to correct timing and engine will kinda stutter but still run. Now If I floor it it's off man like always before its not down on power I don't believe just mostly on partial throttle in higher rpms, (I don't think a vid would do any justice) its really annoying and if it says its running lean that makes sense not enough fuel so I get lag when the computer is tryin to do it's thing. I dont think any problem could have been from sucking a small amount of water which is what my dad claims is what it's from..

What I have done to troubleshoot: (it's getting ridiculous)
I cleaned the MAF sensor
I know its not the o2sensor itself its brand new OEM less then 2k miles on it.
Tried doing the antifouler trick
Tried resetting ecu with stock intake
Tried swapping back to stock s pipe, stock header and stock intake setup, just an exhaust. still getting p2195 and lag..

Now listen to this, when I have my 4-1 header/spipe/antifouler/intake in, no CEL it runs perrfect, vvt-i does it's thing i know how it's supposed to sound. Im just trying to keep stock header, personal preference. But Apparently my car works modded, not stock.. any ideas help please I'm ready to try anything and I don't believe water did this to my car.

Wish I had tC buddies I could swap some sensors with just to make sure it's not mine. Thanks for reading any feedback would be greatly appreciated. Im about to send it in for my insurance claim. I'm getting new bumpers front and rear and hood... and fender wells. It's gonna be so clean, It needs to be running up to par though help me out I have a 06 BSP 68k, manual.

 

Another thing, basic problem is I cant go through the gears revvvin it up a bit and driving smoothly, its all shaky and laggy feeling, unless you floor it then you feel it haul away but maybe some shakiness still not as bad as partial throttle, i feel like its destroying my engine mounts. I would say i get 5 lags/shakes in second gear accelerating about half throttle. I try to just putt around town low rpm like as it is now.

 

This will likely not solve your problem but it would be worth it to try installing the stock intake and the stock exhaust manifold with the new O2 sensor, and resetting your ECU by disconnecting the battery.

I'm going to assume that won't fix the issue (doesnt hurt to hope though lol)

Now, it sounds like the original O2 sensor that came with the car is stuck in your aftermarket 4-1 header... So, when you use your 4-1 header, you plug back in the original O2 sensor that is seized in it, yes?

If this is so, get that sensor out of the aftermarket 4-1 header. Go to town with some PB blast and try to get it off. Have patience.I would try getting a wrench on there and using a hammer on the wrench to produce an impact gun type effect.

When you get the original O2 sensor out, put it in the stock exhaust manifold and try that combo. If it runs fine then you either got a lemon replacement O2 sensor from the dealership, or you touched the replacement sensor when installing it and messed it up it.

 

Yea i've tried that setup, i'm running now with intake and exhaust (full 2.5 s-pipe back, stock header with new O2. no antifouler)

Oh I got it out, lol It looks like it was majorly mis-threaded even though I know it went in smooth, felt like it was welded in there and all the threads are abnormal, I have it jammed in the 4-1 where I wanna leave it cause it probably wont go back in again if I take it out. And of course that means I can't try the old one in the stock header because I would chance messing up the threads in the header>>> im not buying another stock header lol.

I probably did touch the end of it at some point, didnt know that mattered. But it worked fine for awhile, it hasn't been removed since new and I used anti-seize to prevent anything from happening again. I touch the secondary every time I swap it and it always ran fine after I "touched" it. Touched honda ones too. But hey, if that's the only thing it could be, then I might be getting a replacement, then my car will run good?? Hopefully.And just to be sure, you can't clean an O2 sensor right?? that will screw it up

 

I'm having a hard time understanding your posts. Youre using to many "it" and "its" without being clear which one it is... just put the old O2 sensor in the stock header and report back what happens. Make sure to reset the ECU too.

 

Sorry I just typed it as I thought of it, not really proofreading.

FACT: The old O2 sensor is stripped all to hell and I have it carefully stuck in the 4-1 that I use for my nitrous setup. I just bought a new O2, ya feel me. I know how to correctly reset the ecu, your radio stations will be reset as well as the windows. I could throw another part at it but at ~$200 its kinda pricey but my tC ain't runnin' right.

 

your car runs fine when you use the old O2 and the aftermarket header

it does not run well when you use the new O2 and the stock exhaust manifold

how does it run when you use the old O2 and the stock exhaust manifold?



This is how problem solving is done.

 

I understand now, Today after work it won't take but a minute to swap sensors and that's what I'm gonna do. Hopefully it doesn't screw my header up. (is what I was saying) I should take a pic of how bad the threads really are.

I think the header is a harder metal then the O2 so the O2 will get messed up over the threads getting F99999 on my header by doing this.

 

This is what I was saying about the threads being messed up, the oher side is worse.

Hey man just wanted to say thanks for all your help so far in solving this issue. And anyone else who has something to say,, let it rip.

 

Yeah those threads definitely looks nasty. You might want to get a tap set and see if you can clean em up. If the threads get too messed up on the exhaust manifold you either have to find a new part or a good welder. Update when you've tested the original o2 and stock header combo, we should be able to narrow down the cause of the problem then.

 

This guy I live with has a re-threading kit, IDK what you call it but thats basically what it is. He said he will go get it from his storage unit tomorrow after work and we gonna try to retrace or file the threads to make it work.. Will report back soon sir.

 

So yeah, after basically jamming the crappy o2 in the stock header. It works perfectly as should even after 150+ miles. So I ruined a brand new AFR sensor by sucking water with CAI and no fender wells cause i'm low EVERYONE TAKE NOTE OF THAT IF YOU ARE RIDING THE SAME SETUP,, ,if its bad rain, pull over... please.