CATS GOT STOLEN, CUT o2 sensors (1 Viewer)

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like title states some tweak stole my cats cut them right out with o2 sensors and all, its running noticeably rough, I've got down pipes on their way, o2s as well, now the question is will I run into any issues besides the CEL for the rear sensor noticing the cat "isn't working"
State of Hawaii does not have emissions laws so that is of no worry
Any advice would be appreciated
 

Spook50

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FJ62? If you've got a stock drivetrain and exhaust there is no post cat O2 sensor. You do want both O2 sensors in place since one is used for the first three cylinders and the other is for the last three. These are more for regulating the fuel injection in this setup and not so much for smog control (though if the mixture is off from a bad O2 sensor signal, it could lead to a cat overheating which would be bad juju). I've run without cats for years on my 62, but yes you do definitely want the O2 sensors in place.
 
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FJ62? If you've got a stock drivetrain and exhaust there is no post cat O2 sensor. You do want both O2 sensors in place since one is used for the first three cylinders and the other is for the last three. These are more for regulating the fuel injection in this setup and not so much for smog control (though if the mixture is off from a bad O2 sensor signal, it could lead to a cat overheating which would be bad juju). I've run without cats for years on my 62, but yes you do definitely want the O2 sensors in place.
awesome well yeah ill be getting the down pipes in hopefully not long from now, ordered today. will need to straight pipe it the rest of the way, luckily ive got mediocre welding skills
then i gotta figure out why its overheating, my guess is clogged radiator and quite possibly clogged coolant jackets which lead to a blown head? hopefully not the latter
 

Ocho77

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There are major differences in the school of thought. Some will tell you that both o2 sensors are required, others will tell you it doesn't matter. I've read from people it's been run both ways, and seems to not matter.
 

OSS

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If theives are cutting off components from cars on your island, whose to say they're done cutting off stuff from your cruiser? Maybe they see your vehicle as a piece of cheese and they'll come back for another nibble in the future
 
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If theives are cutting off components from cars on your island, whose to say they're done cutting off stuff from your cruiser? Maybe they see your vehicle as a piece of cheese and they'll come back for another nibble in the future
Cats are easy to cut off and easy to scrap for 50 bucks for a quick high, easy to slide under a car with a hacksaw and cut them out
 

Spike Strip

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They use a cordless Sawzall. Caught some fine Biden voters in the act on my wife's Honda a few months ago. They spooked and took off in their truck and I found the CAT dangling, half-cut, and a 'Security' ballcap that had been dropped.

Fortunately, the Muffler shop down the street was able to weld everything back up for $90 drachmas.
 

Spook50

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There are major differences in the school of thought. Some will tell you that both o2 sensors are required, others will tell you it doesn't matter. I've read from people it's been run both ways, and seems to not matter.
In the of the FJ62, you need both. There is no post-cat O2 sensor and both are used to monitor A/F mixture ratio in the engine.
 

Ocho77

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In the of the FJ62, you need both. There is no post-cat O2 sensor and both are used to monitor A/F mixture ratio in the engine.
hmmmm. I only run one in mine and it seems fine. Theoretically they should both be sending the same signals. I'm not smart though.
 

Spook50

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hmmmm. I only run one in mine and it seems fine. Theoretically they should both be sending the same signals. I'm not smart though.
It will go into basically a "limp mode" for the corresponding bank of cylinders if one bank's O2 sensor is gone, but for it to run the best, you definitely want both. If you look at the stock exhaust configuration, cylinders 1-3 have an O2 sensor, and cylinders 4-6 have a sensor.
 

3_puppies

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Bought a 62 series that was sitting in an alley for 1 year, jump started and told the owner the cats were gone, he couldn't believe it.

I thought it was more prevalent back 2007-2008 when scrap was high, but it seems to be making a comeback now a days with all the tweekers
 

mtbrown619

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They use a cordless Sawzall. Caught some fine Biden voters in the act on my wife's Honda a few months ago. They spooked and took off in their truck and I found the CAT dangling, half-cut, and a 'Security' ballcap that had been dropped.

Fortunately, the Muffler shop down the street was able to weld everything back up for $90 drachmas.
Take your bitching about Biden voters to Parler, my friend. Oh wait...
 
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General census is I’ll be fine just gotta have the front o2’s , it’s already in limp mode, kind of just feels like it’s missing, it’s been overheating as I’ve stated previously I think, which may or may not be related idk picked two 62’s up for thousand bucks they ain’t no lookers but they got guts
 

Spike Strip

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Thieves use those lightweight alum jacks from HF, or some other rapid jack; they just shove under and jack without regard to what they F up when they raise the vehicle. A handful of companies is now selling bolt-on Alum belly plates for the Prius that are supposed to make it much more difficult to remove the CAT. Dunno, I don't own a Prius, but I've heard a bunch of people complain about loosing them recently, at work... Some had to pay - out of pocket - about $3K to have the damage fixed.
 

3_puppies

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Thieves use those lightweight alum jacks from HF, or some other rapid jack; they just shove under and jack without regard to what they F up when they raise the vehicle. A handful of companies is now selling bolt-on Alum belly plates for the Prius that are supposed to make it much more difficult to remove the CAT. Dunno, I don't own a Prius, but I've heard a bunch of people complain about loosing them recently, at work... Some had to pay - out of pocket - about $3K to have the damage fixed.

OUCH!
 

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