Currently i'm running a Perrin TBE, Invidia Down Pipe, and Invidia Test Pipe. My check engine light is on due to removing the cat convertor. Anything anybody knows of that would disable this for good? I tried just clearing the code and it comes back on in a couple of days.

 

search "sparkplug fouler" or "fouler"

 

thanks, alot bro! i looked up that info and was able to stumble across another evo forum which i guess i can't post the link to. Did the whole thing procedure involving 2 spark plug anti foulers today and now no check engine light!

 

you can also eliminate the rear O2 sensor from your ECU!