o2 sensor problems

[xBlacKxGTPx]

Ok I have a 2004 gtp and I have SD headers slp exhaust 3.4 pulley and an HP tuner. Can I tune with out downstream o2 sensor? Or can some on mail me a file that my pcmcia can run on with out o2s? I bought a Bosch universal o2 installed it and it still doesn't seem to wanna work. Can some tell what colors go to heater and - +. On both sides of connector? Please help. Thanks.

[TheOtherNick]

Get a acdelco 02 sensor for your car. I dont trust any of that universal crap. Rear 02 does nothing for you for tuning. Altho with out it it may cause the fueling to stick rich because it is always running the cat diagnostic.

[xBlacKxGTPx]

Ok one more think should I or shouldn't I run a cat I have a hi flow but I didt install which WYOMING would be better? And I actually made a really stupid mistake a friend said he could and tried to install the o2 and he took off the connector. But after all his effort he failed. What do u do there.

[xBlacKxGTPx]

Witch way I'm sorry my phone likes to do it own thing ha ha

[TheOtherNick]

A high flow cat wont hurt performance at all. The easy way is run both 02s and a high flow cat. Then when you get a wide band it needs to go infront of the cat.