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I have an 81 280zx and the fuel pump quit working, so I went and bought another one, well in about 2 weeks it quit so I bought another thinking it might have been a bad one, now it quit. What might be the reason and what do I need to do.
Thanks,
Walt
 

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Is rust and debris getting into the pump from the fuel tank and breaking or siezing the impellers? My 78Z had INCHES of rust and scale in the gas tank. The only solution is to remove the tank and have it epoxied at a local radiator shop that also does gas tanks. Around $85. and a bitch to drain and remove.

Also, you can test the fuel pump by wiring 12v to it directly. Use the wire disconnects under the passenger seat. If it runs when you apply 12v, it may actually be the relay.
 
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