Fuel Pump Noise, etc

[austex]

Hey everybody, new Z-owner and first time poster here. One of the first questions I have is about the fuel pump. When I turn the key on, it starts making the usual fuel pump noise....but it doesn't stop. And if I do something like work the turn signals, it pulses in time with the flasher. Time for a new fuel pump, or is that normal?

Thanks in advance. Bear with me, because I just bought her a week ago and I'm still learning about Zs.

[Mat M]

You didn't state what your car is. Sounds usual for an antequated system of a 240. You may be able to mitigate the noise by upgrading to a more powerful alternator, or swapping the FP for a new one.

[beandip]

:classic:Welcome to the Club and Congrats on the ''new'' Z . You didn't state what year your Z is , however I think your PO has jury rigged the fuel pump to a power source not intended for the fuel pump. The 240s , at least '71---73 were wired for electric pumps but only the '73 was equipped with one. If you look back by the gas tank on the passenger side , find the wires that attach to the sending unit mounted in the tank. If you follow up the wire there will be two wires rapped with blue tape. One is green and other Black. the green one is meant for power and black ground. Up forward under the dash and next to the console you will also find a in line fuse holder green wire also. This gets its power form a black/white that is attached to the fuse block. The pump will run as long as the ignition switch is turned on . But it should not pulse with the turn signals or any thing else. Is your battery charged? If it is vary low it might cause this. These cars have a fuel delivery system that has a return line to the gas tank for excess fuel not required by the carbs. keeping cool gas circulating through the lines. Hope this helps . Gary:classic:

[austex]

Oh right, I guess telling you which one I have might be handy. It's a '74 260 that someone droppped a 280 (P79) motor in.

Thanks for the replies so far!