Re: Hard Start
Cycling them by turning the key on and off doesn't do a thing except to get the WTS light to come on and go off and turn the relay on and off since the plugs stay on for up to 2 minutes after you turn the key on. One thing that it might do is get the disk in the relay to move to a spot where it makes better contact with the contacts in the relay.
You really need to test the relay and glow plugs, that is unless you like to spend money for a new relay and plugs.
96 F250 XLT 4x4, 4:10 gears, 5 speed, Tymar intake and HX hose, downpipe, pyro and boost guages, coolant filter, Luc clutch