Poor Acceleration

Definition: Poor acceleration, engine at operating temperature, may appear at cold temperature as well.
POSSIBLE CAUSE ACTION
Fuel filter plugged/dirty Replace fuel filter, refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES

Faulty power piston Inspect and replace power piston, refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES

Dirty or incorrect main metering jets/rods Clean jets, inspect for correct size, refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES

Secondary vacuum diaphragm inoperative Replace diaphragm assembly, refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES

Secondary air valve spring misadjusted Check secondary air valve for binding, perform air valve adjustment, refer to ADJUSTMENT PROCEDURES

Dirty secondary nozzles/rods/jets Clean or replace secondary nozzles/rods/jets, refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES