when the car starts up cold (sitting all night) it starts, but the rev bounces from 1,000 to 500, and back up 2 times, if it doesnt go back up it dies out, and start it again, starts up fine....and now i have this acceleration problem where in 3rd gear at around 2300 rpms, it doesnt want to accelerate no matter how far i put the pedal down, so i downshift and the same thing in second, and then after a little while, it will run like a champ, what could be the problem? the car has been pretty well kept, it has all the service done by a vw dealership ever since it was first purchased, and now that i have it its causing problems, the car has sat for a little while before i got it from my friend, i havent finished paying it off from them either, i would like to keep the car, but if its gonna give me 2 many problems i should get rid of it, so can some one help me figure this out?