Rb20 cat converter

[krystalized_jdm]

Replacing my oem exhaust with a 3" system, while looking at the oem piping I see there is a wire going into the cat. Seems to look like an 02 sensor, not 100% sure.

Anyone know what it is? I can get a picture if you guys would like

If it is an o2 sensor, do I need to get a test pipe or something similar to keep it or can it be deleted?

Thanks guys

[Nismo_line]

Its not a o2 sensor. its a temp sensor. If you get a test pipe without a bung then a buddy told me you can wrap the wire around the test pipe and secure it. If you unplug it then you will have a temp light on in your dash all the time.

[Skym]

Cat overheat sensor (when cat gets blocked it can heat up exhaust), which switches bulb on dash on over I think was 800? degrees C with exhaust temp. Like said in post above, just need to earth it to exhaust via using intake hose clamp, or pull through rubber floor bung / grommet and earth at plug under passenger seat (consult auto electrician on how to do this properly).

If you look behind drivers side sun visor it mentions something about you have to take car to Nissan dealership when that cat over heat bulb light's up on dash (if you can read Japanese). Also that cat overheat light acts as a engine check light for ECU, so don't remove bulb behind dash like some do.

[krystalized_jdm]

So if it isn't a sensor, I should just get a hose clamp and clamp it? I haven't really looked at it up close but I'm assuming there is a bare contact wire? Both posts have me scratching my head haha


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[Nismo_line]

From what i understood from my buddy (has owned many Japanese cars and has done this before). Wrap the sensor around the test pipe, then once you cant wrap it no more just clamp it to the test pipe. Like skym said it will earth it and make it think its still working

[Skym]

Not a good idea, as exhaust moves around when cornering, etc, so needs a bit of play in cable.

Cat overheat sensor is just a plug, bit of loom, sensor on the end. Plug end connects to loom under front passenger seat (put hand under rear of front passenger seat and from memory, should feel a hole and feel plug if put hand in the hole. Maybe easier to remove front passenger seat from car to access plug) and there's a hole in floorpan close to that area with a black rubber grommet in the hole to seal from water, etc entering cabin. That grommet is where you poke the end of cable (sensor end) through and then sensor screws into catylitic convertor (tighten or untighten sensor with spanner, might need CRC or similar, scraping around nut to loosen sensor due to rust, etc).

For a clean / pro look, you pull the sensor through the grommet into cabin, unplug cable and earth plug (easier to remove front passenger seat to access plug, etc).

To earth cat overheat sensor you scratch a bit of paint off side of exhaust (so gets a good connection / earth) and clamp flat bolt part of cat overheat sensor to that area via intake hose clamp. You'll see what I mean when you do it, as it's hard to picture unless you look at car to see what I'm talking about.

I just clamped cat overheat sensor to side of exhaust with intake hose clamp and has been like that for years.

[craftz]

oem cat sensor

I had the muffler shop weld a bung into the new hi-flow cat. Even test pipes come with bung usually.

[beacher1B0]

I believe we can also just ground out at the harness connector under the seat. Remove sensor completely.

[krystalized_jdm]

I think I will just end up grounding it under my seat to avoid further issue and hassle. Thanks for the replies guys


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[92GTSTproject]

Zip tie it out of the way car doesnt need it to run