With my new lease on driving pleasure (S50 swap) came a new set of problems. One of them is the throttle sticking upon initial press of the throttle. It moves smoothly throughout throttle application, but it just sticks upon initial push. If I had to describe it on a scale of 0-100, I would say it like this: It sticks in positions 1-3 and the rest of the range is smooth operation. Sometimes it sticks a little more than other times, sometimes a little less, but almost always I end up revving the engine up having to really slip the clutch to prevent a tire-smoking launch. Tonight, I bought a can of throttle-body cleaner and sprayed the springs and the throttle body opening very well, while moving the throttle position open and closed repeatedly. While it did improve a very little bit when I got back in the car and tried it, it stiffened back up again after a few minutes. I sprayed the points where the throttle body flap contacts the housing and I also sprayed the series of springs outside of the housing. I even sprayed the throttle cable for good measure, but after a few minutes, nothing worked and it was sticking just like the way it did before. I had this problem a while back when the M20 was still in there. It turned out to be a frayed throttle cable, and that stuck in all ranges of operation. I replaced the cable and it was smooth as silk, but this cable (from an E34 525i) isn't frayed in any way, and operates freely. Would else could be causing this? Would this warrant another throttle body?