VolsFan only problems I've had with the straw sucking air at low tank is when parked in my driveway, it's about a 3-4* grade. But, it's enough grade to roll into the street and crank until she chugs to life. Once level the fuel will pull pretty quickly and get to the VP, usually only about 3 crank sessions for 20-30 seconds each and she fires. Wow it's been 6 years since I did this job! Time flies when you're having fun. Just wonder who the heck "you're" is that's having all the fun ? ? ?