ok ive had my offroad pipe on since febuary and the mils have worked but a few weeks ago i had my new clutch put in and since they havent been working........i unhook the battery and they work for a lil bit then the check engine light comes on again.........wats the deal?

 

Maybe its not your mils. did you pull any codes?

 

ya its the mils

 

mils help but they're not the answer. The light will always come back now and then.

If you have a Xcal2 or a Predator you should be able to shut off the rear O2's and that really helps.

 

^^yep my MILs went to chit already, just today..damnit!!

 

Mine work whenever they feel like it ..One day they will work and the next they wont

 

Turn them off via tune like r3dn3ck said.

 

mils= waste of 50 bux

 

^yep, $60 in my case.

 

So does it hurt to run no cats with the o2 sensors in?? Cause I'm installing an o/r prochamber and i was gonna run it until i could get my SCT!!

 

you'll almost certainly throw a code pretty quickly and you could end up with a fouled O2 sensor if the ECU tries to correct the situation by adding fuel. I'd wait to slap it on until you get the tuner. Then just shut off the rear O2's wtih the handheld and that'll keep the code from returning.

 

The rear 02's control nothing but the emissions. The front 02's control the a/f. So no fuel will be added to correct the problem. It has nothing to do with that.

 

So I should be fine for a few passes down the track??

 

Definitely, when your car is full throttle the emissions isn't factored in anymore, the computer sorta shuts if off.