Ok so I went to go to work and my truck wouldnt start. it sound as if it was flooded. I got a ride to work and came home later that night and tried starting it after a few trys and the a jump it finally started. when it was running it would idle from 500 rpms to 1000. i was told to replace the fuel pressure regulator after two hours of labor i did. it started and ran great for a couple. Before this the truck would take a few trys to start but eventually start. on this day it did not. After replacing the regulator like i stated it ran good up until today i got in it and it did want to start acted as if it was flooded. after i drained the battery I let it charge and with a job i cranked it over a few times and it finally started. what the hell is causing this?? it has new plugs, cap and rotor. no green or white build up I checked for it. I have 61 psi for fuel pressure when i turn the key on. could it be a sticking egr or possibly a leaking valve in the spider injection system?