04 Kennebell

Just picked up a s13 sr20det saturday for cheap. I figured all it needed was a tune so i took it to a local shop, draco to get a tune. When he pulled out all the fuel he could it still ran horrible. He said he couldnt be for sure with out diagnosing and being $$$. So Im confused on what could cause it to still run shitty even with all the fuel he pulled out.

Mods are: Gt30714, Sard 850cc, Hks 272's, tial 44mm, hks bov, greddy intake mani, etc. Thats all I can think of that would be helpful. Thanks.