i have been following this problem forever (it seems). since my 02 started acting up w/the long crank/no start condition, right around 80,000 miles. i went thru the walbro process, AND IT WORKED, for 6 months to the day. so, i bench tested the old (stock) pump, and it worked, too. (i suspected it was only working "sometimes" at the start of this nightmare). now, i have the stock pump BACK in the car. when i turn the key, i can hear it PUMPING. here's the funny part-there is NO FUEL PRESSURE, and not even a dribble of gas coming from the fuel line !! i guess my next step is put in a check-valve,,,can someone who has done this provide a little guidance ?? do i need a certain type ??(due to gas, and maybe, pressure)?? is this an autozone/advance/o'reilly part ?? if you could direct me to some help, it would be much appreciated !!