1977-79 Models

Unplug connector from cold start valve. Tape connector to prevent accidental sparking. Disconnect air sensor and positive wire from alternator. Disconnect high tension cable from terminal No. 4 of ignition coil so engine will not start.
Remove cold start valve from engine. DO NOT disconnect fuel line. Place cold start valve into fuel resistant container with nozzle pointing down into container.
Connect jumper wire from one terminal of cold start valve to ignition coil terminal No. 15. Connect another jumper wire from remaining terminal on cold start valve to a good ground.
NOTE: Cold start valve receives power from terminal No. 50. All other electrical components of fuel system receive positive current from the fuel pump relay. Terminal No. 30 is permanently connected to battery positive current, terminal No. 50 only while starter is operated, and terminal No. 15 only when ignition is on.
Activate fuel pump by removing fuel pump relay and bridging pump relay terminals No. 13 and 14. Turn ignition on. Fuel should spray from cold start valve into container in a steady cone-shaped pattern.
Turn ignition off (fuel pump running). Wipe nozzle of cold start valve dry with clean cloth. No drops of fuel should form on tip of valve within one minute. Replace cold start valve leaks or does not perform as specified.