Straight pipe Tacoma 4.0 V6

So as long as those O2 sensors are still there, OP should be fine eliminating those two rearward cats.

 

I guess the shop must have cut the wires then?

 

although you found that on the internet so there is a good chance it's not true right?

 

73% of information and statistics on the internet are made up, so it's probably wrong.

 

sounds like he did it himself from previous posts

 

If the truck is hot and gets into closed loop and the cat is not hot enough because the rear one is gone, your going to get a code...


I would imagine there is some dependency there...

 

I'm going to say no, since URD sells a shit load of Y pipes. If that was an issue, they would have changed something by now.

 

Well, I wonder how he got the code?

 

My guess is he removed the sensors or damaged the wires on accident. That's the only thing that makes sense here.

 

well my apologies with my 3rd gen attitude..

I was wrong..

 

Not true. I have my rear cats removed and no CEL, no O2 spacer or simulator either. If I understand things correctly, the point of the secondary sensor is just to detect AFR, which will not change to outside of the ''acceptable" parameters from removing one set of cats because one cat per side is plenty to combust any significant portion of leftover fuel. The first sensor detects airflow I believe and that one will be thrown off if you remove the primary cats. The secondary cats are basically useless, they just get the truck to the point where it emits less CO2/NOX during operation.

 

Primary is always a/f...

But hey... I've been wrong..

 

did the op put a pipe in place of the removed cats? or are they just cut right behind the sensor and flowing from there? I could see that causing an issue with the rear sensor, and or he ran it like that long enough to throw a code before he put the rest of the exhaust back on

 

This is better than politics on fb lol

 

We'll have to wait for him to get out of school for an update.

It's all Teddy Roosevelt's fault!

 

3rd gen forum?

 

Open headers

 

IB4TL?

 

you don't want to see the stunning conclusion of this Odyssey?