Rough Idle - Cold

POSSIBLE CAUSE ACTION

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

Improper idle adjustment Perform idle adjustment.
Proceed to ADJUSTMENT PROCEDURES.

Improper fast idle adjustments Perform fast idle adjustments.
Proceed to ADJUSTMENT PROCEDURES.

Venturi valve sticking open Clean and service as required.

Venturi valve diaphragm Clean and service as required.

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

Metering rod bent Check and service as required.

Air cleaner duct vacuum motor damaged, always open to Service or replace as required.
cold air source

Improper idle mixture Perform propane check, adjust if
out of specification. Refer to SPECIFICATIONS.