Ive been all over the net tryn to figure out how to delete cats/o2s and still pass emissions. From what I understand some1 has to actually reflag the ecu not just flash a tune onto it. I dunno. I know custom tunes are supposed to be able to do this but from what I heard the o2s still come up as not ready on inspection machine. If any1 could help it would b much appreciated.


Kevosilverado
o5 silverado 5.3

 

A simple tune using HPTuners will work.

 

You know for a fact? I was told it stops the signal but inspection machine still recognizes its there.

 

I have the old school diablo that has o2 cutoff option that I'm going to try 2day.

 

i pass every year with rear 02s tuned out...Hp tuners
State computer plugs up runs diagnostics and it passes

 

Sweet that's what I needed to hear. You guys are on top of this page. Many props.

 

Yes

My 2000 Camaro had a TSP 231/237 cam, Hooker SuperComp 1 7/8 headers, 3" true duals without mufflers and passed. I thought it was funny when I pulled in with the cam thumping and exhaust fumes that would make your eyes water and still pass.

When you tune out the codes correctly with HPTuners the system checks always show ready.