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-   -   Removing O2 sensor J extension bung on FI LTH (http://www.the370z.com/intake-exhaust/119725-removing-o2-sensor-j-extension-bung-fi-lth.html)

reynald3616 02-09-2017 10:43 PM

Removing O2 sensor J extension bung on FI LTH
 
so i went to a tuner because my car have this code p0300 for a while now and recently the car is running really bad and misfiring a lot. This p0300 code started when we installed the FI LTH and so i went to the tuner because this is what they recommend to me and now the tuner still cant fix the issue and told me i need to get rid/remove the extension bung or J bung that comes with the headers and have the o2 sensor bolted directly to the pipe. Is this going to be a fix to my car or not?

lj909 02-10-2017 12:14 AM

Isn't there 2 bung locations?

Sensor 1, direct exhaust flow. (This is what the ECU uses for adjustments)
Sensor 2, extension bung to defeat CEL.

If your tuner doesn't know this, get a different tuner.

Spooler 02-10-2017 06:28 AM

Get another tuner. Seems they are not very good. I see you are in California. I would Sebastian at Specialty Z to tune it.

JARblue 02-10-2017 07:11 AM

:iagree:

I've only ever heard positive things about Seb at Specialty Z

reynald3616 02-10-2017 08:04 AM

the thing is i already paid him $650 i will go back there today and have him look at it again and if he cant still fix it hopefully he can still give me back my money.

JARblue 02-10-2017 08:05 AM

You're risking damage to your precious Z every time you let that tuner touch it. Request a refund (good luck) or just cut your losses and move on would be my recommendation.

Chuck33079 02-10-2017 08:08 AM

Quote:

Originally Posted by JARblue (Post 3614080)
cut your losses and move on

This.

reynald3616 02-10-2017 06:33 PM

Ok so it turns out to be a bad front O2 sensor and now i need a new one. I dont know which one to buy the upstream or downstream o2 sensor? And what brand is a good one with a good price and where to buy them? Thanks in advance

jchammond 02-10-2017 07:32 PM

Quote:

Originally Posted by reynald3616 (Post 3614337)
Ok so it turns out to be a bad front O2 sensor and now i need a new one. I dont know which one to buy the upstream or downstream o2 sensor? And what brand is a good one with a good price and where to buy them? Thanks in advance

Up=stream is the front...usually the rear one's tuned with.
They can be damaged if you used impact wrenches to remove bolts,etc..when removing/installing lth's

jchammond 02-10-2017 07:33 PM

Also,i thought a po300 was random cylinder mis-fire?

jchammond 02-10-2017 07:35 PM

Bosch is pretty durable...but other people make them/a bit pricey for the up-stream(front) one's.....usually the rear's are turned off during a tune-to prevent a cel

jchammond 02-10-2017 07:40 PM

https://uploads.tapatalk-cdn.com/201...836a00071e.jpg
Upstream is in the header & not the J pipe bung


Sent from my iPhone using Tapatalk

reynald3616 02-10-2017 07:54 PM

What do you think about the brand NTK or Denso?

jchammond 02-10-2017 08:01 PM

Quote:

Originally Posted by reynald3616 (Post 3614354)
What do you think about the brand NTK or Denso?

either should be fine...Denso may be oem/ like spark plugs,
NTK is NGK's brand...haven't had to replace any yet @ 77,500mi.
just don't us impact wrenches on exhaust & be sure exterior of sensor's are clean...around wiring.

reynald3616 02-10-2017 08:05 PM

Which sensor is bank 2?

jchammond 02-10-2017 08:08 PM

Quote:

Originally Posted by reynald3616 (Post 3614360)
Which sensor is bank 2?

left side (driver's side in USA)

jchammond 02-10-2017 08:11 PM

I'm going to bed,,,maybe one of the "Senior's" will jump in & contribute on possibilities.
Nite :)

gomer_110 02-10-2017 08:18 PM

If the primary O2 sensor is bad you're going to get more than just a P0300.

barncobob 02-10-2017 08:38 PM

Quote:

Originally Posted by reynald3616 (Post 3614078)
the thing is i already paid him $650 i will go back there today and have him look at it again and if he cant still fix it hopefully he can still give me back my money.

good luck with that one, he has already spent it...hopefully U put it on credit card, have 90 days to fight it.

reynald3616 02-11-2017 01:13 AM

i also get p1168 and p1175

Rusty 02-11-2017 06:36 AM

What happens alot of times when removing and installing O2 sensors. They don't like being abused. On the rear O2 sensors where you have to extend the wires. You have to solder the wires together. If you just twist together and shrink wrap the connection. It will fail in time. As for getting a new O2 sensor, stay with the OEM.

I would get another tuner. This guy is full of crap. You DO NOT need to move the J-pipe. I've had the FI LTH's since when they first came out. I've had no issues with them yet. If I did. Everyone would know it.

reynald3616 02-11-2017 12:11 PM

Anybody had bought parts from rockauto.com?

reynald3616 02-11-2017 04:43 PM

Need help on how to replace o2 sensor. Any video tutorials on how to replace them? Thanks in advance

NorthStyle 02-12-2017 01:18 AM

Quote:

Originally Posted by reynald3616 (Post 3614527)
Anybody had bought parts from rockauto.com?

Yeah, I order most of my maintenance/replacement parts from them unless I can find it cheaper elsewhere. Great company to do business with.


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