My neighbors 1992 dodge dakota sputters and stalls out on him every once in awhile and then starts right back up. Drove it 25 miles yesterday and it never did it. It will do it at all different speeds- We have replaced the fuel filter, cap, rotor, plugs and wires. He also replaced a sensor or maybe air control valve on the right hand side of the motor next to the valve cover-Any suggestion of what we should do next??