Ok, I've had my LT's on for a few weeks now. I realize by not having it tuned I'm not getting the most out of my truck, but am I hurting anything?

 

I think the rear O2 sensors (aft of the cat from the factory) will be getting coated with all sorts of gunk that the cat usually filters out. I think I remember hearing that this will generally throw a code, but if you're not getting anything, maybe you're ok, or maybe its just a matter of time.

 

Na your fine, a tune would make the best of it but it isn't hurting anything, I have had mine on with no cats and only the hypercrap for over a year now and all is good, other then it smelling/ running a lil rich, but rich is better then lean...

JOHN

 

i ran mine with no cats & full exhaust for about 8 months with no tune, and never hurt anything. didnt even throw a code. but i did have the rear o2 simulators. ran fine. but it made a BIG difference after being tuned.

 

well i wouldn't know if it threw a code or not because that g0ddamn evap canister is clogged and the SES light was on when i cut the cats off. I just wanted to make sure I wasn't hurting anything internally...Thanks guys