Catalytic converter and probe (1 Viewer)

[hodol88]

I just ordered MagnaFlow 23894 to replace my catalytic converter. When I took out the old cat, my probe was welded on. So I cut it thinking that I can just order a new one? Should I look for a used one?

Exhaust Gas Temperature Sensor 1981-1987 FJ60 - Used [89425-60030 -U] - $75.00 : CruiserParts.net, Toyota Landcruiser Parts

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Do I need this probe this my new catalytic converter?

 

[lcolon]

The probe is a thermocouple that works with the emissions computer to control things. You don't need it if you are de-smogged. If you still have all the smog stuff, I would replace it.

 

[OSS]

It's there to detect overheating of the catalytic converter. If the cat gets over about 1200°F, it signals the emissions computer to divert the air injection out of the exhaust.

 

[Spike Strip]

I have the Thermosensor in my Magnaflow, but those things were necessary when the Factory CAT was a giant restrictive block. The Magnaflow is much more free-flowing (OBDII spec) and supposedly much more efficient as evidenced by the much-reduced size.

So that sensor is *probably* not needed. And there's no guarantee the used one you get will work, unless it's been tested and is within spec. I have a few in the garage and none of them work.

 

[hodol88]

Thanks for all the advice. I will try Mgnaflow without it then. Should I plug the hole in the Mmagnaflow? How should I use to plug it?

 

[Spike Strip]

Thanks for all the advice. I will try Mgnaflow without it then. Should I plug the hole in the Mmagnaflow? How should I use to plug it?

I don't remember if that's a blind hole into the CAT or an open tube... If it's open, I just you could just bolt a small cap over it or weld the hole or JB weld high temp stuff ?