what kind of fuel pump is everyone running?

 

A lot of people run Walbro pumps. I am adding a STS Turbo so I went with an in-line Walbro GSL392 255LPH rated pump to supplement my stock pump. They also make in-tank pumps to replace the stock pump.

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my in-line pump i have on the truck whines when i turn the key to the "on" position (not cranked). what does this mean?