i cant figure it out. the truck stalls at unwanted times. it will
sometimes
start to chug and stall or it will just stall right away. it will either
start up right away or it can take up to a couple of hours but it will
always start right back up when it wants to. sometimes if i fiddle around
with a few things under the hood like switching the coil wire with
another
coil wire  or any other wires sometimes it will start up. i have replaced
all thte following parts. ignition coil, spark plug wires, coil wire,
fuel
pump, fuel filter, distributor cap and rotor. please give me a few
different leads as to what it could be if you can cause it is getting
very
irritating, it has been happening for about six months now. thank you