No fuel pressure after parking on a steep incline?
Been meaning to get around to asking this question, but 2 months ago I had 190 injectors, regulated return fuel system, and a FASS 200gph installed. My driveway is one steep ****er. Its over 120ft long and there is over a 40ft elevation change from the bottom, to the top. I don't know what percent grade that works out to, all I know is that I hate it a little more everytime I have to bring the trash down for pickup.
Anyway, i normally pull all the way to the top and lock the e-brake first and then put it in park but that first week when I got the truck back I found 2 issues. 1st, If I let my truck get just a little below a 1/2 tank of fuel, the next morning when I cranked it, my FP gauge in the pillar will show no pressure. It cranks and idled just fine but it will take 15-20 seconds before the FP would move from 0 to 70psi.
To fix this issue, I started backing up the driveway (which is nearly impossible in the rain without turning on 4x4) so that my front end is lower than the rear. Problem never happened again after that.
Another issue that I learned not to do again is not to let it drop below 1/4 of fuel. I did once and after a quick 75% throttle run, right after I let out the FP dropped to zero. I guess the acceleration sloshed all the fuel to the back and it sucked air? So long as I'm above 1/4 and not parked with my *** end lower than the front, I never had another issue with my FP.
I'm just curious Is there anything that can be done to prevent this from happening or is that just the nature of these trucks? At least now I know that when ever I do eventually take it to the track, don't go with only 5 gallons of fuel in the tank like I've always done with my gas vehicles to keep weight to a minimum.
2007 Ford F250 CCSB - Daily Driver
KC 68mm Turbo, WPE Intake Manifold, 190/75 Inj, Reg Return Fuel Sys, FASS 200gph, 58v FICM, 4" Exhaust, Studs, EGR Delete
670RWHP / 1153RWTQ-Fuel Only
2000 Ford Lightning SVT - Weekend Toy
Built Motor, Whipple 3.4L SC, Heads, Cams, Fuel System, Exhaust, Suspension, Full interior with AC
10.9 @ 124mph on 18" Drag Radials and 93 Pump Gas