Alright ive got a 3 inch turbo back right now, obviously ses light came on so I tried this antifouler thing... that worked for about 800 miles then poof back on, so added another antifouler, thats 2 that worked a while and poof back on again... So now im leaning towards the perrin electrical cel fix... anywho I have a hole in the test pipe, and a hole in the catback both for an o2 sensor... they are about 1 foot apart, does it make a difference which one I put o2 in? and yes I do have other hole plugged... How many other people had the antifoulers not work???

 

nope

 

antifoulers work for me. the key is to have as small as hole possible in both of them. drill out the one that the sensor fits into with as little clearance at possible to sensor and then leave the hole small on the second one. i got mine from napa. hope this helps.

 

Have you even checked the code to see what it says?

 

Yep its o2 sensor... Should I try and put a 3rd one on? or is it possible that the sensor is just broken? guy at autozone just said rear o2 sensor

 

When you get it checked, you should always get the code. Don't listen to what they say it means - just get the number.

No, you don't put a 3rd o2 on - that's ***** nutty.

 

is it p0420 this is a cat related code caused by the rear o2 sensor

 

I ment a 3rd antifouler not a third o2 sensor lol...