Hi have a 1995 toyota dyna diesel. When engine exceeds 3000 rpm a rattling sound is heard and revs increase without intervention from the driver but does not result in any speed increase a lot of white exhaust smoke is observed. After removing my foot from the accelerator pedal the revs will settle down and smoke will clear within 30 seconds of this event. Suspecting the VE injection pump is the course but confused with the symtoms of this problem and cant make any sense of this. would appreciate any suggestions.