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WARNING! Fuel system components (including fuel lines and carburetor), should be inspected
periodically to ensure that no future fuel leakage will occur, and to make certain that all
vacuum hoses are sound.
3. Hoses that exhibit surface cracks when bent to a 180° position should be replaced. The presence of liquid fuel
demands re-tightening of loose fittings, and hose replacement as needed.
4. Excluding the fuel line, reconnect the vacuum hoses and electric lines as assembled previously to the original
carburetor. All tubes and vacuum sources not utilized must be plugged in order to prevent vacuum leaks and
unfiltered air from entering tine engine.
WARNING! At this time, with the engine off and fuel lines disconnected, check the throttle operation. Be
certain that there is no interference when the throttle lever is operated between idle and full
wide-open throttle positions. Any binding or interference could cause the throttle to stick open
later during normal vehicle operation and possibly result in an accident due to the loss of
carburetor throttle control (or uncontrolled engine speed).
5. Reconnect the throttle linkage.
6. Connect the fuel line. As a further precaution to any carburetor flooding, the installation of an inline fuel filter is
recommended.
7. Set the parking brake. Block the drive wheels to avoid any vehicle movement. Start the engine and check for
fuel or vacuum leaks.
STARTING INSTRUCTIONS: Rough Idle and Vacuum Leaks
If rough idle exists after the engine has been fully warmed up, check for vacuum leaks. Vacuum leaks can result
from unplugged vacuum fittings, torn or improperly installed flange gasket, improper torque on the carburetor
throttle body to manifold hold down nuts, or through improper reconnection of the vacuum lines. ALL
CARBURETOR TUBES AND HOSES MUST BE PROPERLY RECONNECTED AND/OR PLUGGED IN ORDER
TO MEET EMISSION REQUIREMENTS, AND PROVIDE RELIABLE VEHICLE PERFORMANCE.
SETTINGS AND ADJUSTMENTS:
Refer to the manufacturer's decal in the engine compartment for specific idle speed settings for your vehicle. On
automatic transmission equipped cars, the speed is set WITH THE PARKING BRAKE ENGAGED, THE DRIVE
WHEELS BLOCKED, AND THE TRANSMISSION IN "DRIVE'. On manual transmissions, place the vehicle in
"neutral", WITH THE PARKING BRAKE ENGAGED.
GENERAL:
In addition to your Holley replacement carburetor, attention must be directed to the correct engine timing, spark
plug gap and heat range, sound primary and secondary wiring and operational PCV, EGR, and heat riser systems.
These separate, but important factors, each effect the economy and performance of your vehicle's engine. An
automotive system cannot perform to its maximum potential without proper
maintenance and adjustment of all its
components.
Holley Performance Products
1801 Russellville Road
Bowling Green, KY 42101-3542
Phone: (270) 781-9741
Toll-Free Phone: (866) GOHOLLEY
For online help, please refer to the Tech Service section of our website: www.holley.com