They are known for vacuum hose leaks between the pump under the battery and thge actuator at the gas pedal. Usuall;y right bvehind the battery the hose chafes and leaks slightly. Double check that hose. Once disconected from the pump myou should be able to apply vacuum to it and get thje throttle spindle to move nearly to full throttle. Also check the adjustment at the brake/clutch vacuum valves under the dash.