My 2000 4.7 JGC is acting similar. I pretty much have to keep my foot on gas pedal (even while braking) or it dies-but it starts right back up. Other times, it takes a bit and will even start without me turning the key. We haven't read a definite fix, but keep reading that people are suggesting we alter the screws to the PCM [add washers, cut screws] or to look inside to see if solder is damaged. Others say to change crank aND cam shafts positioning sensors. We've done this... but with auto zone parts. We are so lost. Anyone have any thoughts?