99 Stock everything. Truck just recently began hard to start while cold. I used to could hear the lift pump running if I were to just bump the starter for the initial run time but I can't hear it now. I've got good pressure once the truck is running 14psi at idle and not lower than 9psi when WOT. Just as a test to see if the LP was not coming on at all I unplugged it while the truck was running. Truck continued to run at idle but pressure dropped to 0psi so it must be pumping. Just not doing the initial prime.

Any thoughts?

 

mine somtimes will do that. Try this for a laugh. turn key to on, wait 1 min, then bump. I have no idea as to why, but if I wait that min or 2 it works

 

hum, I'll try it and report!

But that would make it an intermittant problem. Yikes