O/R mid-pipe and o2 sensors

[lancec2c30]

If you install an off road H-pipe do you have to use a tuner and clear a setting so the o2 sensors after the cats don't freak out? Or do you just stuff it in there re install the sensors and run it? I tried searching but didn't come up with much on the sensors.

Thanks,
Lance

 

[01yellercobra]

There's two ways to do it. One is to get MIL eliminators to put in place of the rear O2 sensors. The other is to have the sensors turned off in a tune.

 

[olgreydog7]

Better to get them turned off with a tune. The MIL's don't work half the time. Mine never did. Plus, the tuner has many other uses.

 

[mustangman36578]

+1 on turning them off with a tune. i heard of 2 people that said the MIL eliminator connectors caught on fire.

 

[TrueBlueCobra01]

how does having the o2 sensors turned off affect your cars computer? does it do anything at all?

 

[01BlueCobraVert]

It is better to have a tuner instead of MIL's. The MIL's tell your computer the cats are still there and that they are working correctly. The down side to mils is the computer every so often dumps an extra bit of fuel in the system to help keep the cats cool. This is another reason as to why most people have a rich A/F after a midpipe install. The tuner removes the process in which the car monitors the cats and therefore it rids the Check engine light as well as saves on the excess fuel consumption.

 

[lancec2c30]

Something like the livewire or predator can do this can't it?

 

[01yellercobra]

You can turn them with those two tuners. The O2's have to be turned off in the actual tune itself first.

 

[lancec2c30]

the actual tune itself. So by that you mean having a tune created by livewire that turns them off then uploading that to the tuner and into the ECU? Or would I have to have a dyno tune loaded onto it?