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fuel pump

77_FairladyZ

Entry posted by 77_FairladyZ

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So I have a possibly stupid question.... short and simple.. should I hear my fuel pump running while the key is simply in the run position while not running? Or does the pump only run while the car is running?

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rcb280z

I assume you have a 77. The 77 has a fuel pump cut off in the AFM. It only makes contact when the ignition is in the "start" position and the AFM flap starts to open from engine vacuum, and then while the engine is running. This is the only time you have fuel pump operation in the "on" position. If the car stalls the AFM flap closes and causes the fuel cut off switch to activate shuting down the fuel pump. This is a good safety option incase of a car accident.

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