Tune
Former Sponsor
Joined: Mar 1998
Posts: 13,385
Likes: 4
From: Virginia
Generally, no, you do not need to have anything changed.
It's a good idea to talk with us about how you will be having those high-flow cats installed before you do it, just FYI, as we do have way we prefer to see them installed - not that it's a must, it's just a tip, basically.
But to answer your question, no, as long as it is done right and the rear (downstream) O2 sensors are replaced properly, then you should not need to have anything in our tunes changed.
It's a good idea to talk with us about how you will be having those high-flow cats installed before you do it, just FYI, as we do have way we prefer to see them installed - not that it's a must, it's just a tip, basically.
But to answer your question, no, as long as it is done right and the rear (downstream) O2 sensors are replaced properly, then you should not need to have anything in our tunes changed.
Former Sponsor
Joined: Mar 1998
Posts: 13,385
Likes: 4
From: Virginia
No, it will not - not unless some bone-headed tuner does something highly illegal and puts new tunes in there that turn off the rear O2 senors and their monitors, etc., which is highly illegal and subjects them to a $25K fine from the EPA, just to give you an idea of how serious that is.
As long as you use quality cats, and we always use only Magnaflow cats when we do this, then you will not have a problem is the installation work is done correctly.
So as long as good quality cats are used and they are installed correctly, this will not be a concern - now if it turns out you DO have this problem, then you know that either the cats are not good quality or that the work was not done right - and if you are using Magnaflow cats, then this would tell you the work was not done right, as we have used them exclusively for years & years and not once had any such issue, and we do not turn off the catalyst monitors in our own vehicles that run high-flow cats.
So no, the XCal 2 cannot just magically on it's on fix that problem - the only way to fix that problem is to have the installation work done correctly, as no tuner with any sense will turn off rear O2 sensors on a street-driven vehicle.
The rear O2's are there precisely for that reason, to make sure that properly functioning catalytic converters are present & working on the vehicle. And as long as good cats are used and the installation work is done correctly, you will NOT have a problem with this - if you do, look to the installation work, not the tuning, as it's highly illegal to just go in and turn the catalyst monitors off, and these days any emissions inspection station will immediately know that has been done when they connect to the vehicle and scan it.
So it gets down to 2 things - the actual cats you use, and the quality of the installation work - so if you get rear O2 sensor codes after this is done, the work wasn't done right if you are using Magnaflow cats.
I hope that explains this properly, I'm just trying to convey to you what is really involved, OK?
If you have any questions on this, just give us a call & we'll be happy to help, OK?
Good luck!
As long as you use quality cats, and we always use only Magnaflow cats when we do this, then you will not have a problem is the installation work is done correctly.
So as long as good quality cats are used and they are installed correctly, this will not be a concern - now if it turns out you DO have this problem, then you know that either the cats are not good quality or that the work was not done right - and if you are using Magnaflow cats, then this would tell you the work was not done right, as we have used them exclusively for years & years and not once had any such issue, and we do not turn off the catalyst monitors in our own vehicles that run high-flow cats.
So no, the XCal 2 cannot just magically on it's on fix that problem - the only way to fix that problem is to have the installation work done correctly, as no tuner with any sense will turn off rear O2 sensors on a street-driven vehicle.
The rear O2's are there precisely for that reason, to make sure that properly functioning catalytic converters are present & working on the vehicle. And as long as good cats are used and the installation work is done correctly, you will NOT have a problem with this - if you do, look to the installation work, not the tuning, as it's highly illegal to just go in and turn the catalyst monitors off, and these days any emissions inspection station will immediately know that has been done when they connect to the vehicle and scan it.
So it gets down to 2 things - the actual cats you use, and the quality of the installation work - so if you get rear O2 sensor codes after this is done, the work wasn't done right if you are using Magnaflow cats.
I hope that explains this properly, I'm just trying to convey to you what is really involved, OK?
If you have any questions on this, just give us a call & we'll be happy to help, OK?
Good luck!