Poor High Speed Performance (Hot)

Definition: Low power and poor performance at highway speeds with engine warm.
POSSIBLE CAUSE ACTION
Restricted air cleaner Replace air cleaner element

Dirty or plugged fuel filter Replace fuel filter, refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES

Low fuel pump volume Perform fuel pump pressure and volume tests, refer to FUEL PUMP TEST

Power piston binding or distorted Replace power piston assembly and spring, refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES

Secondary vacuum diaphragm inoperative Repair vacuum leak, replace diaphragm if necessary, refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES

Secondary air valve sticking/not unlocking Replace secondary air valve, refer to COMPONENT REPLACEMENT AND REPAIR PROCEDURES

Incorrect float level Perform float level adjustment, refer to ADJUSTMENT PROCEDURES