Just got my car back from the shop. The car idles solid at 900rpm's, but when I push on the gas the car sputters for about 5 to 6 seconds and then the rpm's go to normal. It is almost like it wants to die, sometimes it does and sometime it doesn't. I'm thinking it might be a vacuum line but have no clue were to start looking. I have EGR plates on the car but left the EGR system on, hoping to pass visual inspection. The car also over heats pretty quickly. I don't have the downpipe or manifold heat wraped yet, but what else could be causing the car to overheat so quickly? I'm only running 5psi of boost. I have 2 high performance radiator fans w/ the stock radiator. Any help would be great.