Originally Posted by YoungFordAddict66

on your hard starting problem i see you replaced everything but the gpr (glow plug relay). even with new gps it wont matter if your gpr isnt working. i would either go with a napa part num gpr109 or a stancor, someone with the stancor website or part num should chime in or u could search for it. but the stancor is a monster of a gpr and a lot of guys love it around here. and yea it sounds like ur ebpv is closed until it gets to operating temps, its slugish with it closed and a kick in the pants when it fianlly opens. its there to help get the truck up to operating temps quicker but usually doesnt open when it should. a quick solution until u decide if you want to unplug it, is if the truck is warm but the ebpv is still closed shut the truck off and restart it and it usually opens better than driving down the road a few miles chuggin along. welcome the fte!