I have bud that has a 1997 7.3 F250 and he is having a rough idle/ miss to his truck. It starts fine, runs fine, other than this rough idle/ miss, you can feel it at all times, idle, rev up, driving down the highway. he said if he gets on it hard it gets a little worse and he can feel it want to stutter. Sitting at idle he can turn his DP tuner up and it will get worse. No smoke, no CEL. Injector? IPR? CPS? ICP? Need the best route to take on a college budget. Thanks guys