Will someone please tell me what this is?
- Thread starter Old 40
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
- Thread starter
- #2
I was under my 1980 FJ40 and saw this stuck into one of the frame holes. It appears to be a temperature probe, but I have no idea. It has a two bolt bracket on it and a braided wire going up into the body behind the drivers seat. Any commentary is greatly appreciated!
Maybe a back up switch. Fuel sender wire for an aux tank. Catalytic preverter sensor?
- Thread starter
- #4
I don't think this ever had an auxiliary tank, but it has been de-smogged. Maybe it was a cat sensor of some type?
- Thread starter
- #5
That rusty metal rod is solid as well.
- Thread starter
- #7
Excellent question. The line/wire just goes into the tub. I don't see anything passing into the inside.
- Thread starter
- #8
It "should" appear right at the front edge of the seat.
Does the wire have a color code? If so look at the wiring diagram.
- Thread starter
- #10
I can't actually see the wire, it is in braided sheath that I assume is for heat protection. I will to it on the wiring diagram.
Heat protection sounds like exhaust stuff such as an O2 sensor at the rear of a catalytic preverter
That’s the forerunner to the O2 sensor. It’s a catalytic converter temperature sensor. If the cat was overheating it would send a signal to the emissions control unit to divert the air being pumped into the exhaust system.
- Thread starter
- #13
That makes sense. This truck has headers and was de-smogged way before I got it. All the emissions equipment is long gone with the exception of the charcoal canister in the firewall. I will remove the seat, pull up the mats, and remove it. If anyone needs a charcoal canister, let me know!
Thanks.
Thanks.