Question about 1981 Ford F 100

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Sound from under the hood

When I turn the ignition to the on position, I hear a loud continuious clicking sound. I have always had it since I brought it new. I was told that they thought it was a electronic fuel pump. What do you think?

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Trace the source of the sound and see if its hooked into the fuel lines as it sure sounds like a pump but it could be your tappets too.If you could find the noise and provide a little more info it would be a more accurate answer

Posted on Oct 09, 2008

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One more question

Hi again,

Appreciate the "Ask Me". With your indulgence, I would be re-posting this in your original problem/post here.

To my understanding a "loud continuous clicking sound" indicates a relay or solenoid opening and closing, whereas an electric fuel pump would produce a low tone whirring sound. This might be of help, image of a typical factory installed mechanical fuel pump:
In the possibility that for some reason your particular model has an electric fuel pump, then it would perhaps look something like this:

Jul 25, 2008 | 1981 Ford F 100

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