The main problem people have is NOT drilling a precision hole. People try to drill them without a drill press and hog it out (granted, some people CAN keep it straight without a press). If the hole is straight, I've never seen one not work on an Evo. I have seen a few hack jobs not work at all.

 

Thats exactly right.

 

+1 ^^^ a wideband is a good investment anyways

 

mine is on tb works fine no cel wutsever

 

Mine is on the catback section of the exhaust with the mechanical fix that speedelement threw in the box with my exhaust and I haven't had a light only been about 250 miles so far. Get a premade one not the autozone thing and you should be good.

 

try running 3 of them instead of 2

 

BINGO we have a winner. Just cause the light came on doesn't mean the cell is reading for the fouler, it just as well could be reading for the wires in the O2 sensor. because you damaged them. Give more info, fix to follow.

 

I have a Buschur TBE and I bought their mechanical CEL fix and I just got a "Service Engine Soon light". I had to reset it, it is definetly do to having no cat because I pulled the code. But I'm waiting for a reflash wich will hopefully take care of the stupid light.