Unichip is ONLY tunable by a Unichp deal. So I am sorry there is no way you can change the tune but I was wondering if there was a way you could check to see if there was a tune to begin with. As for spark plugs I think .044" is stock gap. I am running 1 step colder NGK iridiums for now with a gap of .036" but I still get some misfires at idle but no misfires under load. When I get time I will re-gap to about .030" and see what it is like. I will have a wideband in a couple weeks but I think you should start trying to contact turbonetics or Mossy Performance Nissan to get things straightened out.

 

well, I took a look at the setup again today...this time in the daylight with alot more room to see...anyway, the o2 sensor is in the DOWNPIPE...its connected and everything...you think i should disconnect the o2 sensor to see if theres any change?

also i'm still getting the 0301 misfire...can somebody CONFIRM which cylinder that is? is it all the way to the left or all the way to the right? the owners manual doesn't say it

what else should i be looking for before i bring it back to mossy and bi+ch at them? also my friend wants to bring it to church's automotive tuning shop to get it tuned...will it be possible to tune and modify the unichip? or does it come with a pre programmed map that cannot be modified? i don't want him to bring it to a shop...and him paying for something that changes nothing..

 

check unichips site. only unichip dealers can tune it.

 

I think you would come out cheaper calling the unichip tech out and getting the car tuned , that whole new engine that youre heading for very rapidly isnt gonna be cheap . I think u need to be sure everything is hooked up properly fist tho . do u have a boost gauge ? is it possible that the installers put the wrong o2 sensor in the wrong bung . since the fist sensor is a wideband o2 ??

 

thanks for the replies guys!

 

definitely get it tuned by unichip peeps. If you keep running it like this you will blow the motor.

Cylinder 1 is the passenger side of the motor where the timing chain and serpentine belt is.

 

u might also want to pull the sparkplugs to be sure the electrode isnt smashed or melted off .

 

okay I tried swapping out the spark plugs today...i spoke with greg vogel @ mossy performance nissan today, and he told me to re-gap the plugs to 0.025 of an inch....stock for the TC i believe is 0.044 of an inch....we so tried that and took it for a spin...the misfiring is alot less apparent....and it seems like the 2-2.5k spot is gone....but we still pulling a cylinder #1 misfire on the obd scan tool...i wonder if swapping coils would help?

 

oh yeah, when i pulled the plugs, they look to be in healthy condition....no abnormal signs of corroding, fouling, etc....looks pretty healthy for a 35k mile spark plug..

 

Well you could swap it and if the misfire moves then its the coil pack. Have you talked to Reggie at Turbonetics..

 

alright guys...just wanted to update you on the situation for those who are following...

I disconnected the connector for the o2 sensor...and what do you know? it drives PERFECT...i am absolutely stunned...drove around all day, no misfiring what so ever...under any load or any RPM....had the scan tool hooked up the whole time...and only pulled 0031 which stands for bank1 sesnor1 o2 sensor...no 2195, no 2196, or 0301...NO OTHER CODES! just the 0031

wtf!?!?! damn this is pretty stupid...well we know the o2 sensor is the culprit now...i will try removing it tomorrow from the downpipe bung...and maybe spraying it with TB/Carb cleaner...i heard this helps?

anyway, does turbonetics supply this o2 sensor? my friend said something about turbonetics warranties all their products and will replace any broken/defective products no question asked

 

could it be a possibly the o2 sensor is not working right....and is not compensation for the turbo? cuz i know putting a turbo will add alot more air into the engine (lean)...and the o2 sensor isn't doing its job by telling the ecu to add more fuel in?

and by disconnecting the o2 sensor, it will run completely open loop? i.e. a rich map?

 

there is 2 sensor.

first sensor after your manifold is oe afr.

2nd sensor is mounted on the s-pipe

there is a possibility that you could have damaged it when you toke it off. its pricey tho, i got it last time for 175

 

well the one i disconnected was the one on the DOWNPIPE....so I guess that qualifies as after the manifold...like you said

and if anything, i'm not the one who damaged the sensor...mossy nissan installed it...what a bunch of g@y fu*ks if they did break my friend's o2 sensor...

I never took a look under the car...this S-pipe is the one after the downpipe on turbo tC? I will check it out tomorrow...

btw, what size piping is the trd exhaust? is it an axle back? my friend wants to get 3 inch piping but wants to keep the trd muffler cuz it sounds nice....is there a way to make custom 3 inch piping all the way to the muffler? and if it's an axle back exhaust, i could chop off the axle portion of the piping and go straight 3 inch all the way to the muffler?

 

Sounds like the primary O2 sensor may be damaged. This is not something Turbonetics provides so I'm not sure if they would be able to cover that as it was most likely not damaged by the kit but more so by the install if at all. I would absolutely NOT spray it with carb cleaner of any kind. Your best bet is to get a clean shop rag and try to clean it off a bit. Also I don't recall if this was asked but the O2 extender is installed on your secondary O2 sensor right? As in not the one you unplugged? Just curious as that could cause a problem. Let me know if theres anything I can help with from a Turbonetics stand point but at this point it looks like a faulty O2 sensor is the source of your pain.

 

Wow! That's pretty strong language. First of all, Mossy Nissan didn't do the install. It was installed at a shop near us, by an ASE Master Tech. I'm sure we didn't break the o2 sensor. Is it visibly broken? Or is it just gone bad? I stand behind the installation done on this car. If it had a compromised part before it came down, and the turbo exsasperated the condition, well that's a different thing entirely. In speaking to the technician, he thought it had a slight hesitation/misfire when it arrived, but everything looked fine and it wasn't throwing any codes.
You and his dad drove the car while I was here, and nothing was mentioned then.

 

I know its off topic but when is your exhaust gonna come out for us turbo tCs?

 

Sorry for the bad words Greg...I'm not directly blaming you since I am aware that Mossy did NOT do the install...just a little frusterated for shelling out so much money on getting it professionally installed, to only find out an O2 sensor is most likely the culprit...

I know we test drove it before we went home...and I had already felt it when I first pulled the corner...I told myself "no problem...Richard runs 87 octane when he was n/a...the gas tank still has 87 octane thats probably why its misfiring....with the combination of turbo lag, of course this is normal"...Then I filled it up with 91 when we got back home...still misfiring like crazy

I pulled all 4 spark plugs and regapped them to 0.025 like you said when I called that day. Didn't make a difference...swapped around coilpacks later on...still didn't make a difference...so I just said "I'm going to remove the o2 sensor" since I keep throwing this damn 2195 and 2196 codes....and it worked! I have yet to pull the o2 sensor to check the condition...I will be doing that later today....

Once again sorry for the harsh words...I hope we can get this problem solved by next week and just move on with our lives...you know what I mean?

 

Cool, cool. I was just a little taken back. You are definitely a guy with more knowledge than most. And I'm always going to stand behind what I do. If I sold you the O2 sensors for my employee cost, they would be:
front $136
Rear $83
Both would need to be ordered.

I defintely want to be able to provide good parts for good prices to the Scion community, just like I do for Nissan. Albeit at a smaller scale.
BTW, the crank pulleys are almost done, amybe a couple of weeks, and I'm still looking hard at doing the 3". I just need to do 12 minimum, and I would like to have 8-9 spoken for. It's still under consideration.

 

if the o2 is the reason and it was from due to the install...

i believe the o2 should be replaced for free

just my .02