Stall, Stumble, Hesitation - Cold

POSSIBLE CAUSE ACTION

Cold enrichment or choke system Check linkage for proper operation
not functioning. and adjustment; clean, service or
replace as required. Check choke
pulldown. Check voltage to choke
cap.

Accelerator pump not functioning Visually check for fuel discharge
and service as required.

Low fuel pump delivery Test fuel pump. Refer to
FUEL PUMP TEST.

Feedback motor malfunction Check and service as required.
Refer to FEEDBACK CARBURETOR
ACTUATOR MOTOR.

Clogged fuel filter Clean or replace as required.

Power valve stuck closed Replace power valve.

Improper or obstructed main jets. Replace carburetor.

Air cleaner duct vacuum motor Service or replace as required.
damaged

Venturi Valve Diaphragm failure Replace diaphragm.