Under light acceleration, the vehicle will surge forward. Basically feels like it's getting sudden extra fuel delivery, but not constant as it really tends to "jump" multiple times. Once up to speed, no problems. Accelerate hard and no problems, but if you are just trying to baby it through a parking lot, it will beat you to death. Not every time. If it is going to happen, it will happen with the first acceleration after you crank it and typically won't happen again the entire time that you have it running. Park, turn it off and get going again and all bets are off, you may very well be in for a beating! Any ideas?