why do i have to let the fuel pump run three times before van will start on 2002 Pontiac Montana

i have replaced the fuel regulator and 02 sensors, on im still loosing my fuel pressure. i have to turn key on and off three times before the van will start

by in Wellington, OH on November 11, 2012
1 answer
ANSWER by , November 11, 2012
Faulty fuel pump.