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power to fuel pump changes when plugged in


rhettro74

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Ok so I am doing a turbo swap into a 1977 280 from an 1982 280zxt its been sitting for a while now have spark working ok but I was testing my fuel system and I find the following:

I have wired it according to the swap faq "bumblezee" the leads get +12 for about 5 sec then none I am sure once the car starts it will get power again as it should.

However as soon as I plug it into my fuel pump I get barely +3 sometimes nothing unplug from pump and the power goes back up I have checked the ground going to the pump and its fine I can leave the ground plug connected to the pump disconnect the power lead to the pump and check and have +12 but as soon as I connect it back to the pump it goes back to nothing basically ---

Is this a bad fuel pump I am using I think the one from the 77 car.

 

Thanks

Rhett

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