A surging or bucking during acceleration can be caused if the distributor is moved or mis-indexed. This is a result of the cam and crank position sensors being out of synchronization. Wear of the oil pump drive gear can cause similar symptoms because it allows excessive free play in the distributor drive. The distributor drive gear and bushing should be replaced if the rotor tip moves back-and-forth more than 3/16th of an inch when checking drive gear free play.Google+
Car Problem Reports
Dodge Dakota Mis-Indexed Distributor May Cause Surging/Bucking During Acceleration
Dodge Dakota Problem
Visitor, 1997 Dodge Dakota, 104,020 mi
Two months ago I had a complete tune up of my Dakota, so I don't think it is a distributor problem. Nevertheless, while decelerating to make a turn I had to brake, because the truck did not slow down. After the turn was completed the engine was still accelerating. I pumped the accelerator while braking (I was by a playground.) The truck kept accelerating. I pumped the gas again and finally it stopped speeding up.