Legion5

Hey, I'm putting together a fully built engine package, and I've been hearing about lots of tunes NEEDING to disable the rear o2 sensors. This doesn't sound entierly accurate to me to need to turn o2 sensors off, but if it is accurate can I just set the o2 sensors to on using the SCT program and using MIL eliminators and have the same tune?

I'm planning everything out at the moment but I'm trying to plan a car that will pass inspection.

suoperdave84

I talked to the guys at Brenspeed about them once when I was figuring out what to do about headers. They said that with some of the catted header packages, it flows too well and throws a code and you get a CEL. Not sure about inspection but this will fail you in an emissions test. I assume an inspection too.

The bad news is, if your car is 2007 or newer, the MIL emilinators won't work at all.

one eyed willy

i have a 2007,tried to do the eliminators and they did not work,had to use a tuner.

Legion5

Guess I'm lucky that I have a 2006, what's the best set of plug and play ones?

Legion5

My inspection is OBD-II only. So with catted headers it flows so well that it always gives a CEL which is an emmisions FAIL, but with the rear sensors disabled it gives a NOT READY notice on the insection, so really with catted headers which I have it will never pass emmisions without a eliminator.

Legion5

bump

SirKnightTG

So having a MIL elim will allow a car to pass the OBDII test? Not that I have to have that where I live now, but I will eventually.

I'm also concerned about this on 2008 models if I change to one of those.

If I can run LT w/ a prochamber (high flow catted likely) and pass the OBDII I'd be good.

suoperdave84

The way I understand it, it doesn't matter which header you choose, even catted version, you are not going to get through emissions. I guess it varies from state to state, but here in MD, you won't pass unless you get a cool state employee to look the other way.

Plus if they are super strict where you are, just the fact that the cats are in a different place is enough to fail you.

The MIL eliminators are supposed to fool the computer into thinking everything is fine, and if you're lucky you can pass the test. Anyone with '07 and up though...screwed.

chabbz182

That is not true I have longtubes and high flows and i passed.

SirKnightTG

Since you're from the Dallas area and you passed with those then that makes me feel a bit better. I know the Dallas and Houston areas are some of the most strict areas in Tx for emissions. I'm about 25 miles or so from Austin.

What year do you have and is your rear o2's disabled in the tune or do you have MIL elims?