I long time ago my turbo seal went out on me and oil+coolant went through my intake. Not much went through, but my main worry is if the IC would not function as well as before because of this. I haven't taken it off, but I have replace the DV and check other areas and there were traces of oil from the past in them. I only ask this because my boost is falling about 5-8 PSI short of where it should be and I cannot find a vacuum leak anywhere and I had my codes read at an Autozone here and they did not find anything...any suggestions or past experiences? Thanks.