remove or relocate cat?

[ZRotheohv]

I just finished rebuilding a nice PTO gearbox and put the new PTO gear in the transfer but when I threw the assembly up there the cat was in the way. Way in the way. So would it hurt (besides the smog regs) to take it out? And what would I do with the oxygen sensor? Or would a better option be to relocate it? If I was going to relocate it, though, I'd want a skid plate under it. Any ideas?

 

[FJ40Jim]

The cat can be removed and the truck will still run fine. Might even pick up a pony or two.

If the cat is removed, then the catalyst overtemp sensor is no longer necessary, so it can be removed.

 

[WHITCHCOCK]

Semi-hijack

Jim
I'm in the process of putting in a rebuilt 3fe in my 62 and will keep the 02 sensors in the stock positions, but can I leave out the cats or will it screw up the computer? Either way I'm putting in a inside the rail system with one or no cats anyway.

 

[ZRotheohv]

so just doing away with the oxygen sensor is okay? wouldn't make the truck run richer or leaner?

 

[60wag]

62s with fuel injection have oxygen sensors mounted in the exhaust pipe and are definitely needed. 60s with carburators have a temp sensor stuck in the cat to prevent overheating the cat. If you have a cat, you might as well have the temp sensor installed.

Co Springs has smog testing doesn't it? You'll need the cat to pass. You might be able to move it to the rear 6 inches or so to clear the PTO?

 

[import silvia]

These are not hi-output engines, just leave the cat on and keep the air that little bit cleaner. And as has been said the O2 sensor is needed on the 62 to run correctly.

 

[hodag]

I pulled mine as the first step on the de-smog, and noticed no discernable difference. But, there is no smog-testing in Nebraska, so I cant say how the emissions changed.

Hodag

 

[ZRotheohv]

ahhh so the 60's have heat sensors and not oxygen sensors. so what does this heat sensor control?

 

[FJ40Jim]

The emission computer monitors the cat temp sensor.

If cat temp is too high, AI is switched to bypass to the air cleaner.