the pump is mounted to the frame rail, so I would guess maybe 5 inches give or take.

It was 70 degrees out. So no ice. Cool enough I had the heater going with the top down.

I know that when I let the car sit, the gauge will go to zero. When I first installed it, the regulator would hold 50 psi for about 3 days.
Lately it will drop to 0 after sitting a few min, and sometimes it will hold for an hour, but rarely more than that.
Bad reg?

The pump was still making noise, but I was in a bit of a loud area, and all I could tell was it was running. Didn't sound different, but it was hard to tell. If anything it was quiter then I remember, but I was near trafic so hard to tell.
The efi system auto shuts it down after 3 sec without start up.