draining the fuel tank

[stickybones]

Can't seem to find the answer in the archives...

If you have a hotwired fuel pump (I didn't do the hotwire job), how do you drain the tank from the fuel rail? Some threads say to jump the gray lead at the back of the alternator to +12v. But with my hotwire setup, I'm not using that gray lead anymore. Will powering that gray wire still work? Also heard to jump the brown wire on the alternator, but that doesn't seem right either.

Also, gnttype.org says to use a clear rubber hose to look for bubbles to know when the tank is just about empty. Is this the way to go or is there a better way to know when you have about 1/2 gallon left in the tank to not cavitate the pump?

Thanks for the help. Wanta run Sunoco 111 leaded next time at the track and it would be nice to empty the tank of that useless 93 octane stuff.

Mike

 

[azgn]

there is a black connector (and a green one) in the wiring harness under the alternator.....if you apply 12 v to the black connector, your fuel pump will run and you can drain the tank off the fuel rail.......you will know when fuel gets low...the pump will change sound......