WTF is this? (1 Viewer)

[Flying40guy]

Ok Gurus, I’ve had this piece dangling from the engine bay side of the firewall and have no idea what it was for. Looks like there may have been an electrical short or something that partially charred the green connector. It was like this when I bought it. Any idea what this may have been for? ‘77 FJ40
Thanks.

 

[Solace in Solitude]

I don’t recall what the carb cooling fan “activator” (I cant recall the name) looks like, but I think this “button” is it.

it would normally be mounted under the manifolds and would close a circuit, by activating a ground, to trigger or activate the carb cooling fan at a certain temp.

Old wiring and an old circuit board in the carb cooling fan controller under/behind the glovebox could easily result in a short and subsequent melting of insulation/wires.

 

[spotcruiser]

That's the temp sensor for the carb cooling fan. The earlier ones mounted above the carb insulator above cylinders 4 and 5. I think the hose clip on top was for the hose from the PCV valve.

Melting of wires and plugs in that area was common due to contact with the top of the head or air manifold.

 

[Flying40guy]

Thanks for the reply! Makes sense because I thought there would have been a carb cooling fan. BTW, I’m diggin the Golden in your profile pic. Mines a little spooked of the 40 I guess because I guess it’s a little loud?

 

[Solace in Solitude]

Thanks for the reply! Makes sense because I thought there would have been a carb cooling fan. BTW, I’m diggin the Golden in your profile pic. Mines a little spooked of the 40 I guess because I guess it’s a little loud?

Chester loves 44 off road... not so much on the highway.

 

[Flying40guy]

Thanks spotcruiser. That also makes sense. I have a buddy with a ‘78 and his cooling fan is on the left side pointed at the carb. This one would only have the distance to mount where you said it would go. Love learning about these machines!

 

[77mustard40]

Here’s a great thread on the subject if you’re considering running one, cheers

fj40 carb cooling fan...do you run yours?

I just fixed my carb cooling fan and my FJ is now cranking (warm cranks) much better and I'm sure it is due to the carb fan fix. Do most FJ drivers have a functioning carb cooling fan? I have a 78, but I'm not familar with the story behind the fan...it seems like a design flaw fix and I wonder...

forum.ih8mud.com

 

[Flying40guy]

Here’s a great thread on the subject if you’re considering running one, cheers

fj40 carb cooling fan...do you run yours?

I just fixed my carb cooling fan and my FJ is now cranking (warm cranks) much better and I'm sure it is due to the carb fan fix. Do most FJ drivers have a functioning carb cooling fan? I have a 78, but I'm not familar with the story behind the fan...it seems like a design flaw fix and I wonder...

forum.ih8mud.com

That’s fantastic! I’m gonna take a look at that and see if that’s something I could do.