| Are you referring to the anti fire solenoid, or commonly known as the fuel solenoid? If so, remove the wire(s), remove the solenoid from the fuel bowl, hold the solenoid against the body of the engine to ground it, hook up the wire(s) and turn the key. If it moves up and down in response to the key being turned on and off, it is working. Sometimes, the solenoid will benefit from being cleaned on the piston rod, and lube. |