Alright this is going to be hard to explain but, when I'm in 4th gear or automatic its most noticeable. if i keep the gas pedal in the same position the car will try to accelerate for a second, slow down, and then do it again and again. inconsistantly though. its FEELS like the car is only getting short sporadic bursts of gasoline to the head...but i dont know if has anything to do with that at all. any help troubleshooting this would be much appreciated