when i put it in gear it stumbles and bucks,when taking off. on 1995 Ford E-150

have replaced, fuel filter, ingine idle contol valve, engine control module, plugs,plug wires, cap and rotor. the speedomoter jumps back and forth, and the cruis control don't work right. ever so often it will run fine, then acts up again..

Asked by for the 1995 Ford E-150