[Wyteboii86]

So I got tsp long tubes and high flow cats. The cats they give are junk so I'm getting cat below threshold on both banks. I did the spark plug non fouler trick but now I'm getting both downstream sensor high voltage. Used 2 foulers per sensor with one drilled out and the second one normal. I know some cars are weird and gotta do different stuff for it to work. Do I need to put steel wool in or drill the second one out bigger?

 

[shademaker]

I tried everything. You might get check for o2 to set as ready sometimes. As soon as you do a pull you'll gets codes. Antifoulers get rid of differential code. However, you will get voltage codes for it not changing fast enough or temp code out of the rear o2.

 

[Vet Rider]

You have a tune?

 

[baabootoo]

The factory cats are junk? By who's opinion? "204 out the door", so they can't be too bad. It's a very well-designed package!