Hey guys. I'm a gasoline drivability tech, I have a chance to snag an 04 f250 fx4 6.0 for 5000. It doesn't start very easy, but eventually it does start, also while idling the oil pressure gauge drops to nothing, as soon as you hit the throttle it jumps back up though. While driving it doesn't like to accelerate past 2000-2300 rpms. I have messed with the 6.0s a little here and there, and I havnt had a chance too hook it up to a scanner yet. I more than likely wouldn't have the opportunity to scan it until I bought it. It idles great, and runs great up until right around or past 2000 rpms. I know you guys probably see this a lot, but I need your input. 5000 is a lot of money to me. What should I look for on my scan tool?(I have a very capable scanner) and so on. Thanks.