Car running awful

[RooDaddy23]

Today i just installed upper and lower intercooler pipes with a greddy type s on them plus a rnr turboback o2 eliminator exhaust. I run the l hooked everything up on the bov and i think its right. I even hooked up the small line on the bottom of the bov to the turbo and the return into the intake but it makes no difference. Where the rnr exhaust had no cat but has a o2 sensor after the stock cat i cut a hole in the test pipe of the exhaust and welded in the o2 sensor. When i went to drive the car it makes a funny noise around 3k rpms and runs awful. It shakes wont build up rpms and sounds like its goin to blow up. I dont have any other mods to the car. Im not sure if i did something wrong with the BOV or the exhaust but my car wont run right at all.

 

[RooDaddy23]

OK to update my condition.......... I removed the BOV and the upper intercooler pipe and put the stock back on. This did nothing to change the condition. Next i tryed unpluggin the O2 sensor from inside the car that goes behind what would be the cat. if i had one. Still nothing. I need some serious help. The only other thing thats different on my car now besides the exhaust is the fact i cut out part of the stock air box plastic so as i could get the ic piping to fit correctly. I plan to put on a cone filter in a few weeks ne how i just didnt think i had to have one to get the ic pipes in. The air filter is still in the box its just not connected to the fender now and part of the side has been cut out. Is it possible i dont have enough back pressure now that i dont have a cat. and 2.5 exhaust pipes all the way back with a eliminator pipe as well? ITs all on the stock turbo which is a bit worn but had been workin fine before this. Any suggestions would be great.