I'm replacing the exhaust system with an OEM muffler/tailpipe and a MagnaFlow Direct-Fit catalytic converter. The Denso sensor that Cruisercorps sells is 1 wire (mine has 2), and another one from a supplier lists a different Denso for 1985 that has 4 wires ( I could use the 2 black wires to make it work), but the sensor is too fat to fit in the converter tube. Both sensors have the flange and gasket that look like they should work. Any advice would really be appreciated.
1985 FJ60 Catalytic Converter sensor
- Thread starter jkm5484
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
I'm no expert on this but I am going through the same process with my 60. I think the sensor Cruisercorps sells is an oxygen sensor and the sesnor you need is a temperature probe/sensor. The pic below is one I bought used from cruiserparts but you have to ask for one with a good flange and it's pricey. I'd try putting a want ad in the classified section.
The sensor is really not necessary. It only warns you if your 
is to hot to park in tall grass. You could just bolt a small metal plate over the hole until you come across a sensor to put in.
is to hot to park in tall grass. You could just bolt a small metal plate over the hole until you come across a sensor to put in.- Thread starter
- #4
Thanks guys, You're both exactly right. Been running OK the past 20 years with the original sensor welded back in, but showing no resistance. I didn't cut the weld to see what it looked like. Frustrating to get all new parts and end up with a hole in the system, but I found one due to your help. Just need to know more than the companies selling the parts. I knew it wasn't an O2 sensor, but SOR and the other FJ parts places kept calling it that. Thanks again.
Not necessary with the Magnaflow hi-flow CAT. That 'bung' into the CAT is not open, it's a closed blind hole. You only need it if you're subject to a VISUAL inspection and the tech knows to look for it.
It’s more like a air tank over-pressure release valve on an air compressor.
If the compressor malfunctioned and continued running, the over-pressure valve ensures that the tank doesn’t blow up.
That cat heat sensor (and emissions computer) turns off the air injection if the cat overheats to prevent a fire.
It was also probably a legal requirement- like life jackets on a commercial passenger vessel.
If the compressor malfunctioned and continued running, the over-pressure valve ensures that the tank doesn’t blow up.
That cat heat sensor (and emissions computer) turns off the air injection if the cat overheats to prevent a fire.
It was also probably a legal requirement- like life jackets on a commercial passenger vessel.
Gretsch
SILVER Star
Well this is good to know. Another day of learning something new on here. I had an exhaust shop put together a new cat back exhaust system for me sometime back. The cat they used did not have a provision for this sensor so the tech 'built" a mount point for this sensor in the cat using some scrap. Spent a good part of the job doing it. I thought it would be needed for something......but my desmogged truck has no air pump any longer. So I guess with this that work was wasted effort. Oh well.