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Discussion Starter #1
Apparently the vibration/buzzing sound I was hearing at the automatic transmission Selector while idling at a light is a faulty fuel pump.

The foreman noticed this sound on the floor of the right side back seat. I also went to the back & noticed the sound on the floor.

Maybe the sound at the transmission selector was referred from there.... I don't know.

They said they tested the fuel pump.

Does anyone know how they test a fuel pump to know it is faulty?
 
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A new fuel pump is on back order.

I think they said they tested it outside the vehcile & could hear the same noise.

By measuring its output flow pressure, can they duplicate the noise to confirm that this is the problem.
 
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