Truck Won't Start
 

Hey guys heres the problem. When I shut off my vehicle it will just crank over and not start. I put a new fuel pump relay on it already, The fuel pump dosen't work when you turn the key on you can't hear it running when the key is turned on. The truck will start after awhile and then it will act up again. Does anybody have any info out there for me. It also has spark at the plugs.
Thanks Uno

I had some people tell me check the Ignition box or the ECU

When was the last time you replaced the fuel filter? I just had the same problem with my car. Wouldnt even start. Changed the filter and it fired right up.

check the crank sensor also, cheap enough part. Not hard to change.