Mount the pump in rubber, if it already is, try a different pump. I've done serveral TBI conversions and have only had one that I could hear the pump power up at start up.
I swapped it for a new one and it was quiet.
Make sure the pump is mounted to the frame and not the tub, the thinner metal on the tub resonates the sound.
Butch
I swapped it for a new one and it was quiet.
Make sure the pump is mounted to the frame and not the tub, the thinner metal on the tub resonates the sound.
Butch