Have a buddy who purchased a used Evo IX. He's getting the infamous "No cat" code with the AMS Stage 3 powered Evo IX. Would think with the flash that particular code wouldn't be a problem but it is. No biggie.... Just going to do the spark plug fouler mod.

Need to know what sensor to put the fouler on......the sensor on the o2 housing or the 2nd sensor?

Any help is appreciated. Thanks in advance.

 

the sensor on the cat (2nd sensor)!

lil info:
front sensor is mainly used to monitor afr for the ecu, and the 2nd sensor (on the cat) is mainly for emissions control.

 

There's no cat but thanks! 2nd sensor it is!

 

ya just space it out then, u might need two spacers, but try one and see if it gets the job done!

 

Will do. Thanks!