Catalytic Converters required?

brentburgess171 · 10-22-2005, 10:11 AM

Has anyone gutted the catalytic converter on there Titan? I tried it on my previous ford and the results were amazing. WV doesn't require an emissions test for inpection. The only thing that concerns me are possible computer problems.

Vyrus · 10-22-2005, 10:19 AM

If you have a 4x2, you have 2 cats. If you have a 4x4, you have 4. People have removed 2 of the cats on the 4x4 with sucessful results (no codes). As for removing all, I'm not sure.
-Cyrus

GreenT · 10-22-2005, 10:23 AM

You could do it but you will get an SES light. You would need to use 02 simms to trick the ECU into thinking the 02 sensors are getting the correct after cat readings.

brentburgess171 · 10-22-2005, 10:23 AM

Which two did they remove? Thanks for the info.

brentburgess171 · 10-22-2005, 10:29 AM

Quote:

Originally Posted by GreenT

You could do it but you will get an SES light. You would need to use 02 simms to trick the ECU into thinking the 02 sensors are getting the correct after cat readings.

What are 02 simms and where do I get them?

Vyrus · 10-22-2005, 10:35 AM

Quote:

Originally Posted by brentburgess171

Which two did they remove? Thanks for the info.

I believed they removed the downstream cats (the later ones) which do not have O2 sensors. Maybe I'm mistaken though, searching should reveal a few threads about people who have done this. Most of them replace with resonators.

Quote:

Originally Posted by brentburgess171

What are 02 simms and where do I get them?

O2 simulators are an electronic device which sends a signal to the ECU where your O2 sensor would have been. They are pricey, but you can pick them up on Summit Racing or Jegs or any other performance shop.
-Cyrus

brentburgess171 · 10-22-2005, 10:54 AM

Quote:

Originally Posted by Vyrus

I believed they removed the downstream cats (the later ones) which do not have O2 sensors. Maybe I'm mistaken though, searching should reveal a few threads about people who have done this. Most of them replace with resonators.

O2 simulators are an electronic device which sends a signal to the ECU where your O2 sensor would have been. They are pricey, but you can pick them up on Summit Racing or Jegs or any other performance shop.
-Cyrus

Thanks for the info.

GreenT · 10-22-2005, 10:58 AM

02 simms shouldn't be that expensive. About $25 a piece or so.

**gr8titan** · 10-22-2005, 02:28 PM

Quote:

Originally Posted by brentburgess171

Which two did they remove? Thanks for the info.

Remove the "downstream secondary" or rear-cats on a 4x4. No ECU problems. I've replaced them with "straight thru resonators" and no regrets. Click on my links below my SIG for install/fabrication pics.

brentburgess171 · 10-22-2005, 02:50 PM

Quote:

Originally Posted by gr8titan

Remove the "downstream secondary" or rear-cats on a 4x4. No ECU problems. I've replaced them with "straight thru resonators" and no regrets. Click on my links below my SIG for install/fabrication pics.

Why not gut the factory cats and reinstall the empty chamber?

QShip · 10-22-2005, 07:54 PM

Quote:

Originally Posted by brentburgess171

Why not gut the factory cats and reinstall the empty chamber?

He suggested that in one of his earlier threads about his exhaust.

motoman139 · 10-22-2005, 09:39 PM

its hard to say on the o2 sims. when I got some for my civic they were about 100 bucks and still threw codes so its a hit and miss kind of thing