Now that I have the car re-assembled and running I'm having a pretty severe hesitation problem when I try to accelerate in any gear other than 1st. If you press the gas more than half way the car hesitates for a second before accelerating but if you let off just a tiny bit it will stop hesitating and go. I've checked the plugs and wires but so far havent come up with any reason for this annoying problem. Any ideas?