Certainly on my checklists, you start with the lowest tank, taxi, then before the power run, brakes on, set 1200, fuel pump on (check pressure), change to next tank, fuel pump off (check pressure), set 2000, carb heat on / off, mag checks and check idle. Then continue to hold and do pre-take off config.
Ensures sufficient fuel flow from both tanks and at high RPM too - by the time you're lining up you have typically done 2 - 3 mins on each tank.
Last edited by LeeP-PA28; 6th Jun 2011 at 12:38.