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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


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Old 05-03-2017, 04:22 PM   #1
240msh
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SR SR O2 Sensor

What can happen if my o2 sensor wont screw into my turbo elbow all the way? Ive had to buy 2 different turbo elbows and im just going to eventually buy a new one once i have the money.. long story short i need to drive with it like this. the o2 sensor is probably about 50% screwed in. is that bad? what can happen?
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Old 05-03-2017, 04:28 PM   #2
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The tip of the sensor should be completely in the flow of exhaust gases to properly read the mixture. With it partially threaded in you will probably have an exhaust leak and the car may not run as it should, probably running richer than normal.

Very similar to how people will space out the second o2 sensors on OBDII vehicles to trick their ECU into not throwing a code when the cats are removed. The spaced out o2 sensor only sees a limited amount of exhaust gasses letting the ECU think everything is okay.
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Old 05-03-2017, 04:36 PM   #3
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If you have the Fat type 02 sensor this will be much easier and cheaper than a new elbow.
https://m.summitracing.com/parts/lil...ca0xoCU0zw_wcB

If you have a skinny sensor I THINK those are M14x1.5 but I could be wrong.
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Old 05-04-2017, 09:27 AM   #4
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get a tap and die to clean the threads...will go in without issue...the thread in adapter will get stuck too...
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Old 05-04-2017, 12:45 PM   #5
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not a big deal. you can unplug the sensor if you are worried about it. engine will run fine as long as you dont have any boost leaks.

This is completely accurate. The maf sensor does a great job by itself without closed loop.

I don't even run a narrowband in any of my engine swaps. I've tuned over a hundred cars with no narrowband.
They are actually more suited for sheep to drive the car, and not worry about the a/f ratio.

Last edited by Kingtal0n; 01-13-2018 at 04:18 AM.. Reason: noted some skepticism
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Old 05-04-2017, 01:15 PM   #6
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Quote:
Originally Posted by bardabe View Post
If you have the Fat type 02 sensor this will be much easier and cheaper than a new elbow.
https://m.summitracing.com/parts/lil...ca0xoCU0zw_wcB

If you have a skinny sensor I THINK those are M14x1.5 but I could be wrong.
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Originally Posted by jedi03 View Post
get a tap and die to clean the threads...will go in without issue...the thread in adapter will get stuck too...
Do this, way cheaper than buying a new elbow and it'll be fixed right.
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Old 05-04-2017, 02:21 PM   #7
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well i pulled out the o2 sensor and im just gonna tap it, now i noticed my threads on the o2 sensor are bad also lmao.. its the fat type aswell and the cheapest one i can find is like $50
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Old 05-04-2017, 03:21 PM   #8
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well i pulled out the o2 sensor and im just gonna tap it, now i noticed my threads on the o2 sensor are bad also lmao.. its the fat type aswell and the cheapest one i can find is like $50
cheaper than a sensor, and solid investment. Although if your sensor is old it's a good idea to spend the money on a new one.

https://www.summitracing.com/parts/a...1039/overview/

https://www.nissanraceshop.com/produ...-top-fat-type/
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Old 05-05-2017, 12:51 AM   #9
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you can use any narrowband you want. Even a 1-wire will work. Walk down the aisle at auto part store and price check them till you find an $8 or $12 unit and use it. Just match the signal wire to the signal wire and it will work.
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Old 05-11-2017, 12:30 PM   #10
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Quote:
Originally Posted by 240msh View Post
well i pulled out the o2 sensor and im just gonna tap it, now i noticed my threads on the o2 sensor are bad also lmao.. its the fat type aswell and the cheapest one i can find is like $50
They're less than $35 on Rockauto. Since it's fat type, you can get the S14 or Z32 one. Only difference is the length of wire. S14 is 12" of wire, Z32 is 22" of wire. Both are plug and play.
S14: https://www.rockauto.com/en/moreinfo...209114&jsn=375
Z32: https://www.rockauto.com/en/moreinfo...209844&jsn=451
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Old 07-17-2017, 11:58 PM   #11
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Quote:
Originally Posted by LoSt180 View Post
They're less than $35 on Rockauto. Since it's fat type, you can get the S14 or Z32 one. Only difference is the length of wire. S14 is 12" of wire, Z32 is 22" of wire. Both are plug and play.
S14: https://www.rockauto.com/en/moreinfo...209114&jsn=375
Z32: https://www.rockauto.com/en/moreinfo...209844&jsn=451
had a question about this to as i also need an 02 sensor, someone was telling me a 300zx TT 02 sensor works as well is that true? I have a E5 ECU
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Old 07-18-2017, 11:21 AM   #12
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Originally Posted by doridoridori View Post
had a question about this to as i also need an 02 sensor, someone was telling me a 300zx TT 02 sensor works as well is that true? I have a E5 ECU
A Z32 is the chassis code for a 300ZX, so it's the same part I referenced above.
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Old 07-18-2017, 01:14 PM   #13
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A Z32 is the chassis code for a 300ZX, so it's the same part I referenced above.
fail i read it a bit too fast but gotcha thanks
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Old 07-19-2017, 03:03 PM   #14
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good lord I spent $4.00 on my O2 sensor, a 1-wire. You don't need an expensive sensor oO
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