Fuel Pump won’t stop

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Fuel Pump won’t stop

Postby MikeB » Fri Aug 14, 2020 2:24 am

Hi there from NZ. My pickup has been sitting for a couple of weeks went to start it yesterday fuel pump kept pumping eventually fuel over flowed tapped carny bowls (twin carbs) fuel leakage stopped fuel pump stopped ticking and we were away.
This morning I turned the key fuel pump kept ticking again and again except this time no fuel overflow just continual ticking. Tank is full of fuel and pump is fairly new. Question is if pump is continually ticking but no overflow of fuel what is wrong can anyone help please.

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Re: Fuel Pump won’t stop

Postby myoldjalopy » Fri Aug 14, 2020 11:44 am

Sounds like it is pumping air instead of fuel - but I can't see why this would happen suddenly. You say the pump is new so unlikely to be a split diaphragm but anything is possible, I suppose. First thing I would do is detach the fuel line at the float chamber and see if the pump will then pump fuel into a jam jar or similar container. If it does, then see if the pump stops when you block off the end of the pipe with you finger. Obviously, safety precautions apply regarding exposed petrol.

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Re: Fuel Pump won’t stop

Postby jaekl » Fri Aug 14, 2020 12:35 pm

Important question, is it a very rapid pumping - lack of fuel or air leak, or is it slow pumping - actually moving fuel?

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