Catless Question

[Saltillo Express]

Hey guys. 2006 2500 5.7. I'm planning on going catless. Does anyone know if we can still use the anti foulers on the down stream O2 sensors to not throw a CEL? If so can I drop them in where they are? Or do I need to move them back some with O2 wire extensions? I'm not going to tune the truck, so I am not going to be able to turn them off in the tune. Thank you for any response.

 

[nathantc]

i also would like to know this as i have a hard time spending $300+ for parts that in no way benifit my truck. (bad cats)

 

[ViolentMouse]

you have to stack the anti foulers, two on each o2 sensor. you do not need to move the location.

The reason for stacking, is the first one needs to be drilled out to let the sensor fit inside of it, the second one threads onto the first one and into the exhaust pipe.

it's a game of trial and error, you need to get the o2 sensor out of the stream enough that it still reads, but doesn't read too much.

all the off road trucks I built we always put long tube headers in them, added bungs for the rear sensors and stacked anti foulers. never had an issue with a stock tune throwing a CEL.

If it's a truck on the street, then there is some legal stuff about federal violations for tampering with emissions controls...might want to brush up on the law