Classic/Antique Car Repair: 1990 f 150, volume test, pressure and volume

Question
QUESTION: my friend has a 1990 f150 2wd p/u with a 302 the truck starts right up but when it gets warmed up and you give it gas it diesany thoughts

ANSWER: Is the stock? has it been modified? Is it equipped with the original fuel injection?
Let me know.
Brad

---------- FOLLOW-UP ----------

QUESTION: yes it has the original engine stock with fuel injetion

Answer
This could be a computer related problem, a plugged fuel filter, a bad fuel pump, a defective ignition coil, or a defective ignition module. I would recommend that the computer be scanned first to check for trouble codes then take a fuel pump pressure and volume test if the computer comes up clean. This is an electronically computer controlled machine and the old car simple diagnostic procedures are out the window.
Brad