rear 02's
 

Just put long tubes on and a dual exhaust. Didn't have rear 02 bungs put back in and not running 02 sim's currently. Planned on having them tuned out but haven't yet. To my understanding the Front 02's control the mixture adjustments to the car, and the rears alert whether the Cats are working properly, correct? Without the sim's they will just trip a code?

Car has been misfiring since the install and friends were trying to tell me that the rear 02's could be effecting it. Making sure I am correct. I believe I may have faulty new wires or coil ignition problems. Its misfiring in cylinders 4 5 and 6. Thanks

i think your right, the rear o2's tell the computer if the cats are working properly..

Yeah, you're right about what o2s do what. Check your plugs, replace if they look suspect. Make sure your wires are on all the way. That's a start.

You are correct sir! grab an ohm meter and check the resistance in the plug wires n coil packs, i think you'll find your problem there.

what resistance should the wires be at? I put the heatsheilds back on the plug wires could that be causing a small gap?