Help! New swap not running right?!?!?

[DinoMan]

Okay so i bought a new s13 sr20det swap off of someone here on the forums not too long ago. It was put in about a month ago by a shop and i have been trying to tweek it and get it running good since then. The car will start but idles badly and doesn't drive too well. If i take it out i'm scared it'll stall out and ill be stuck. When i give it gas it doesn't feel like its putting down the power it should. It will take a bit for it to rev up and when i press the brake pedal in it will only go about halfway in then i cant press it anymore. If i try and hold the rev at 3k while at idle it can range from 1500 to 4500. If i leave it alone it sometimes idles at 1200 or 500 and in between. If left long enough it stalls out. I have checked everything i can think of and it seems everything is hooked up right. I am not a master mechanic as i am only 16. Any help would be greatly appreciated! Here is a list of supporting mods on the engine:
Stock s13 sr20det ecu
Stock sr20det mafs
new ngk spark plugs
isis intake manifold w/stock t/b
dc sport bottom mount turbo manifold
GT2871R turbo
circuit sport stainless steel braided turbo feed lines
hks turbo outlet
circuit sports 3 inch downpipe
greddy light weight pulley set (blue)
exedy stage 2 clutch
exedy light weight flywheel
Koyo rad
Cxracing intercooler and piping

I have a video and will put it up as soon as i can upload it since my computer is being super slow right now.

Dinoman

[PyR0NiAk]

Ugh. First, you need to get a better fuel setup if you're going to run that turbo. With the fuel setup, you'll need a tune as well. With the rpm jumping issue, start out with checking for boost leaks. Does it actually build any boost. (By all means, if you don't know, don't go out trying to run your motor to redline to try and build boost.) If that turbo was run on that engine with that fuel setup for any extended period of time, or even ran hard for a short period of time, there's a good chance your engine has seen some serious lean conditions. Compression test would probably be a very good idea.